Fixing the Ugly Shadow Issues in Unreal Engine 5

[@WilliamFaucher]

To be absolutely clear, when I mention that the nanite fallback mesh has its normals flipped, this is not a fact, I meant it just as a way to describe what we’re seeing, in the hopes of clarifying the result we're seeing with raytraced shadows.

[@codeFriendlyART]

To be honest it kinds of feels like a bug. In the sense that it is like if the system still be attempting to render shadows pertaining to the 'fall back' nanite resolution, when in fact there is really no need to attempt doing so, given nanite is being supported by the hardware at the time being (in your particular system for example) and fully working. So in that regard, I would not really know if it is 'not a bug'. Like maybe it is not in the sense of it's functionality but maybe yes in the sense that it should not be attempted to be rendered if not really needed.

[@WilliamFaucher]

@@codeFriendlyART Totally hear you. I’d say it’s more of a “known limitation “ of nanite when using raytraced shadows. They’ve mentioned this in their livestreams, they know this happens, they’re aware, and I’m sure they’re working on improving this.

[@GencoUney]

I think the fallback mesh is visible to the ray tracer but not to the camera. Hence hard shadows on the negative space in between.

[@abdufatikhovich]

G'day Mr. William. I need a recommendation from you. Now I can buy maximum GTX 1070ti for architecture in Unreal Engine. Should I buy it and use software lumen or collect some money and buy cheaper RTX card for hardware lumen in order to get better results. I watched some videos where I have seen some advantages of hardware lumen . P.S. I need the best and realistic results in my UE renders.

[@Hyrppa95]

What is actually happening is because the fallback mesh has lower polygon count, some parts of it are closer to the light than the nanite mesh. This causes the nanite mesh to be occluded by the fallback mesh. There is no one size fits all solution for this kind of a problem.

[@christopherrobin7984]

Quality of these videos is through the roof! Thank you!

[@WilliamFaucher]

Thank you!

[@123zhc]

I just ran into this problem and here you are with the solution I'm looking for. Thatk you so much!

[@DatGuyGLK]

I also found that increasing r.RayTracing.NormalBias to 5-10 fixed the shadowing on these organic, rocky nanite meshes, seemingly without any performance impact or quality loss (at least I havent noticed in my scene). EDIT: '' The setting is determining the distance away from the surface where the ray begins. Normally, the ray would begin right at the surface, but you can use this setting to push that beginning location away from the surface in the direction of the normal. The higher you set this, the less accurate results you'll get with reflections and shadows. I imagine it will cause the "Peter Pan" effect where shadows don't connect to their casters if you set it too high. '' - Ben Clover, Unreal shader guru

[@re5128]

I realized that a lot of small shadows of the geo will be missing with changing the Normal Bias.They just dont show up

[@jackywong4481]

It lose self shadow detail a little bit, but acceptable in game play, this parameter will also bend RT reflection result, so be careful to tweak it.

[@ColoraceCG]

And help you command bias of Lumen

[@WilliamFaucher]

Yeah this is not a solution I can recommend because it massively affects contact shadows, and that is no bueno. Of course, if it helps your situation go for it, but it's not something I would actively try doing. For games, sure maybe. Cinematics? Absolutely not

[@ColoraceCG]

@@WilliamFaucher UE game engine

[@MrTVset]

Will, I really appreciate these videos!

[@WilliamFaucher]

Thanks so much!

[@DUHRIZEO]

This stuff has been such a big initial hurdle for me being new to the engine. Understanding how your hardware, project settings, and assets used all need to work together. It hasn't been as out of the box for me as the engine is advertised, so thank you so much for the detailed explanations in these videos!

[@nokander]

Out of the box visualization software very seldomly produce such photorealistic output as UE5 and offer very few customization possibilities. The learning curve for UE5 isn't that steep thanks to KZbin tutorials, but ironing out these little details can sometimes be a challenge. There's never any short cut, not even AI offers that, as of now.

[@VictorNorman_76]

oh man. was scratching my head on how to even search for a solution to this problem and by magic you came along and sorted it out. Thank you!!!

[@polyforge3d]

The fact that such a professional tool like Unreal Engine has issues with basic elements like shadows right at the beginning of a project creation surprises me.

[@weightednormal3682]

Forcing everyone into Lumen and Nanite with no easy opt-out was brutal

[@mihaiciocan2169]

Just started my unreal journey with unreal sensei s intro tutorial then i found another video that linked to you and 2 other channels and i saved you both in my bookmarks, then I wanted to see how my first scene looks with ray tracing and encountered this problem, searched on google and second option was this video and now i see you are the guy from my bookmarks, thanks a lot and looking forward to learn this software with your help included, thanks a lot again i went with the second option as it seems to resolve the problem the best, the third one still left weird small shadows when i would zoom out

[@karolinasereikaite8233]

Wow thank you! I ran into that problem with multiple light sources, I found a solution by enabling dynamic shadows (if I remember correctly) only for one of the light sources (sunlights). It was solved. Super happy to see other smarter options!

[@WilliamFaucher]

Cheers! Glad it helped!

[@sf4d]

Your channel is a gold mine, and I greatly appreciate not only that you show your processes, but that you explain the more and sometimes nuanced concepts behind *why* something is occurring.

[@christopherrobin7984]

Absolutely agree with this. Teaching us to both use the engine and simultaneously also understand it.

[@dogzillal]

I have to say as a level designer not everything you talk about is useful especially when it comes to the render queue but everything else has been immensely helpful and I always look forward to your next video. Great work and keep them coming

[@dogzillal]

@A-fxs u should take a look at williams nanite video, he explains why based off how nanite works at least for why it doesnt work for nanite but the material not showing i assume has something to do with it being a mask

[@graydawn479]

This video is a life saver. It is clear, concise and informative. Not only that but it provides multiple solutions. Thank you!

[@timoxton]

Your videos have been ESSEEEENNNTTTIAAAALL to understanding the changes in UE5 - and have saved me hours of headache. Cant thank ya enough.

[@maxer167]

There are lots misdirecting solutions on the internet about it . Most of them are about the UVs and no one seems to know why. This one clears of everything in an instant. Thanks

[@WilliamFaucher]

Thanks! UVs?? I’ve never even considered that, is there any substance to that solution? Does doing something to the UVs even do anything? Genuinely curious

[@maxer167]

@@WilliamFaucher They try to solve that by proper uv setups which does not seem to work(read in forums ) . there are just rumors going on . actually no one understands the correct solution. You solve it just with a click

[@JWPanimation]

Thanks for this! There are some other fixes in the comments along with how to edit your ini file. Unreal seems to have quite a few technical gotchas and I really appreciate William's post here on KZbin.

[@perumedem3646]

Amazing William! I've discovered that using the second solution, you can turn on the "Two Side" option of the material and it will cast shadows on both directions. For me this is the best solution.

[@MrSlickBobby]

You are really good William. No one else is doing videos as in deptha dn well explained as you. Thanks for fixing this issue for me.!!!

[@mridulsarmah8709]

Hi William, could you make a video on creating displacement in landscape shaders or meshes with vertex painting? Now that tesselation based displacement is gone, it's kind of problematic to get displacement with vertex painting or multi material meshes.

[@innxcence]

YESpleasseee

[@epicantyock4331]

Agree!

[@germanmairen]

It's exactly what I was gonna ask. How to use displacement maps in UE5? (im coming from Octane and C4d and it's pretty easy there)

[@willking6423]

It's hidden in the bridge. The UI of the three lines at the bottom right.

[@spawn6000]

yesssssss

[@safofilmes38]

Man, you saved my life about "Fallback Relative Error 0". Thank you so much. I always watch your content.

[@acsomiT]

William, every time the "pop" sound comes up, Im thinking of opening a bottle of wine. I love it! I enjoy your videos! 🙏

[@SoftwareAcademy]

Firstly, you're a legend. Secondly, someone on a forum had suggested that in the console command, if you set raytrace normal bias to 5, it fixed the issue as well. I've tried it, and that works too.

[@WilliamFaucher]

That does work too! But. Major but. That variable affects contact shadows, or smaller higher frequency ground shadows and as a result I cannot recommend that approach

[@reservabalsa]

William, thanks for all this information. I faced so many of this issues in Unreal and was really frustrated that those wouldn't have a fix. And it is also great to know what is causing the issue. Keep it up and thanks again.

[@christiangschweng1552]

Bro, THIS is a game changer. Thank you very much. I was about to tear my hair out after not finding a solution for several days.

[@WilliamFaucher]

Cheers! Happy to help!

[@manavgala2361]

We really need you to make a full UE filmmaking course, man. Hoping to see this sometime in the future.

[@avistryfe4534]

Thatd be a dope 4000 hour video.

[@KIY0TO]

Thank you for your tutorial on shadows. Yet again, your vidoes provide a learning point for my team. W have always been a fan of your videos, and we truly thank you for you content.

[@LosAmigoz]

Informative and easy to understand. Thanks for top notch quality as always William!

[@danimorrow6317]

Always a life saver - thank you! As usual, you give us not just effective (& accurate) solutions, but explanations for why the problems happen and the fixes fix them. 100% awesome. TY!!

[@thanos879]

Subscribed. I always subscribe to channels that DON'T beg me to subscribe before they've even given me any useful information. This channel is gonna be huge one day because you're in it to actually give us useful information, not to use us and clickbait us for money.

[@amitkhanna6]

Hey William, Great explaination about the fallback mesh. Here is another thing which have solved this issue for me without going through every nanite mesh to change the relative error. In 5.1 this cVar also fixes the shadow issue but is prone to crash sometimes when you test - r.raytracing.nanite.mode 1 And thanks a lot for putting in so much time and effort to create these videos. Great content !!

[@lemming77gode]

this is a great fix. Disabling two sided geometry for the shadows caused other artefacts, but this fixed it.

[@armangfx]

William you still saving my projects. Thank you very much for real. God bles you man

[@neiljamessloan]

Kudos to you and your school of learnings Mr William Faucher. I tip my hat to the classy, useful and enjoyable experience you and your tutoring gifts.

[@iLEZ]

Fabulous! I just encountered this problem on my first serious foray into UE, and you solved it immediately.

[@griffithpictures]

Yes! Yes! and Oof! This was a rough one. And thanks for the solution... As always you are ahead of the ball! Solution #2 helped 75% of my scene. For the remaining, I turned off the nanite.

[@igorbolmene4974]

Thank you so much, I searched a lot for this and your videos are amazing.

[@ernesthemingway6563]

Thanks for the technical explanatons, new to UE5 here!

[@psy237]

amazing thanks a lot! I do not only know how to "fix" it, but what's actually happening! That helps a lot, also in choosing the solution. I'll go for non-ray-traced shadows for the beginning and see if I run into any issues and then go from there! Thanks, perfect infos!!

[@Aidenjh11]

William - thank you. I'm a big fan of your tutorials. So well done.

[@BlazingTyphlosion]

Dho, I didn't even know that thidh problem ekdhidhted, but I guedh thidh idh a good tutorial on thidh problem. Well done. 👍🏻

[@난나니뇨-k1w]

I have suffered from this problem for a long time. Thank you very much.😇👍

[@lucdelamare8996]

This came in clutch William, thank you so much for this!

[@WilliamFaucher]

Glad to hear it man! Cheers!

[@rmanj2300]

that bit you explained the inverted normal reason for tyhis phenomenon blew my mind, how do you even know this knowledge!!!!!

[@RwanLink]

Thank you for your work William. Do you know why the folliage is blurry and ghosting in ue5 as soon as we add some wind?

[@Artof3drendering]

Actually i was using the second one that for archviz works perfect! but now i see we can have 2 more options, thank you for this 3 solutions!

[@WilliamFaucher]

It's so great to have a series of options to choose from! Helps us artists in production for sure :)

[@manonthedollar]

Thank you so much. I came across this issue for the first time last night and found my way over to the Fallback Mesh setting myself, so I must be getting better. :). Doesn't fix it completely, and not my favorite solution but I guess it is what it is.

[@rickfuzzy]

Love your vids. So nice to have some intelligent understanding below just the surface do this do that.

[@zookinipokolini]

THANK YOU! I was going nuts trying to figure out the issue.

[@alexrizzo7740]

Solution #3 was the best for me, thank you very much!

[@MatchTerm]

Thank you, bud! Your tutorials are nice as I navigate this landscape. Would love to see some tutorials regarding day/night cycle.

[@panchocapo2011]

wow..... very interesting and impressive analisys.... your conclussions sound quite accurate. In my case I migrated a 4.27project and "cast Ray traced shadows" set to "use project settings" was a pain in the a... But switching it to "disable" works fine for a few Still Images

[@jbach]

Thanks William! Please keep these great tips coming.

[@sharangacustoms4325]

Thank you, William, for your work! This video helped a lot of people!❣

[@terramidia3d]

Thank you! Very well explained.

[@MrSlickBobby]

You are the best out there for all of this stuff. Love your videos. Thank you so much.

[@DmitryFadeiev]

What should I do if my shadows in project look draft? Even the tutorial at 720 resolution, the shadows look sharper, while mine looks blurry. Please help!

[@fhnb16]

You saved my mental health, thank you very much!

[@renstillmann]

Thanks you, this fixed the black spots on an imported GLB, it had all these strange black spots like a cow haha. I tried to recalculato/repair normals, which did make it less worse but didn't fix it. Setting the "Cast Ray Traced Shadows" to "Disabled" totally fixed it. Thank + Subbed :)

[@SLPCaires]

Can see now why turning off double sided works. From the pov of the ray when its off it only sees the back side, so you dont get the self shadowing on the front. Really this has to be something you should be able to set per object, and the option should be double sided Off by default. Because things like flags/cloth/leaves are probably the exception rather than the rule

[@pappajhons9145]

Man you're solving theese faster than the devs. I'm porting a vr animation proyect to unreal 5, and kinda lost in the engine being honest. (monoscoping rendering). Thanks to your recent videos, I think my team and i can actually deliver the short.

[@hammadwalid8428]

Great video as always William, thank you very much for sharing with us. I have a issue with UE5 (EA and Release) lumen, and is that by lighting only with SkyLight + Hdri (not sun), black-non-metallic and metallic-white materials, which have a Roughness 0.3 - 0.7, generate a noise that comes from lighting the Hdri, it's affect reflections and shadows. This cannot be fixed, not even by increasing the samples on PPV, with any method The other lights do not generate noise, only the Skylight + hdri. I would like you to help me please

[@WillWrk4Mayo]

Thank you for all the helpful tutorials!

[@massivetree7937]

When I set a console command like the one to turn off shadow casting for single sided materials, how can I set it so I don't have to keep applying the same command every time I open the engine?

[@atasafarzadeh7110]

William, your channel is one of the best Unreal Engine channels.✌🍺 I would like to discuss path tracing mode. Ray tracing offers gamers a convenient, fast, and time-saving option. Okay. But what about reality? There is no way it can be more powerful than the path tracing zone and the light solver algorithms. UE is also used for cinematic and architectural visual effects projects, and path tracing and development of this feature are required to fix issues with translucency, reflection, refraction, and volumetric MTLs. However, I want to emphasize the importance of realty and the difference between gaming renders and cinematic renders. Hopefully, Epic team will consider these features in the future.

[@WilliamFaucher]

That’s why UE offers both Lumen and the pathtracer. You can choose. There’s also the rendering speed to be taken into consideration. Not using the pathtracer means you can get very very close to pathtracer results, but at a fraction of the rendering time. If you need the best quality, use the pathtracer.

[@atasafarzadeh7110]

@@WilliamFaucher yeah, Just for the sake of argument.TNX 😊

[@roadtoenviromentartist]

William when Iam working with animation asset trought shading the shadow remains static.. Any idea?.. Only in the releases 5.x Other way is working bad non casting shadows but terrible result..

[@nickudin2683]

Hey! How to use 3 solution with landscape?

[@patrickikolo]

HI Dear Fellow... I'm running to an issue with the nanite clipping terrain on my third person default character When i am looking him from above ... When nanite is disable no issues, but as soon is activate and i turn around the default third person character the landscape disappear beneath the character

[@moowmoowmoow7688]

Incredible ! So clear ! Thank you for your explanation !

[@RichardRiegel]

actually, you solved my 5 day suffering (with that fallback relative error) many thanks :)

[@marvinbadalanimations9182]

Thanks.Question . When rendering the final.Does the render look at the viewport ? Does it use the fallback or does it render the highest quality based on what you have setup as render output ?

[@yugi9710]

Yo William thanks for the in depth explanation ! So I have this small bathroom scene only lit with rectangular lights and getting noisy shadows. So since there's no nanite meshes should I just switch from virtual shadow maps to shadow maps for interior scenes ?

[@karthikunrealarts]

Thanks William.. always on time. Exactly what I wanted.

[@snook-official]

The r.Raytracing.Shadows.EnableTwoSidedGeometry 0 command seems to no longer work in 5.2. I think it because they've created a new console command to fix the issue. r.RayTracing.Nanite.Mode 1 which sets it to not use the fallback mesh.

[@AnimexOver-vb9oy]

First video i seen of yours. Thank You :3

[@gatzkerob]

Another caveat of "r.RayTracing.Shadows.EnableTwoSidedGeometry 0" is that when you view a nanite mesh through a translucent mesh, the artifacts are visible. Not sure if it's related to the translucent mesh being double sided or the type of shadow it casts.

[@digipixelvfx5983]

HI William, the depth of field is not coming over the fire and water in my scene ! its nor defocusing the fire in front of my camera. please help me out.

[@williamminnaar6311]

Hello again, a question! I have done a number of animations in UE5 Beta with some of my heavy scenes - Large maps with many buildings, foliage and people - They worked fine and processed the scene in the sequencer - BUT, since I moved the projects to UE5 full version - I am getting an error - Virtual Memory is exhausted? Never had this before? {Running and Asus STRIX 1080Ti [11Gigs Ram] - Intel 20 Core + 32 gigs of Ram}

[@akhild-e3k]

how to fix far shadow disappearing issue? Ray traced shadow is on and using utra dynamic sky plugin too. in normal lighting by turn of raytrace shadow helps but while using UDS its not giving a solution, please help

[@antoniozeferino3560]

HI , William Faucher the "r.Raytracing.Shadows.EnableTwoSidedGeometry 0" solve for me but wen i package project shipping is not working :(

[@C-0-C-0]

Super useful as usual! Merci William!

[@rushboardtechuk]

I feel as though in a future update there shouldn't be two meshes, but rather a structure where the Fallback is a layer applied to the Nanite mesh, much the same way as AO is to an entire scene. I have not yet downloaded UE5, but was wondering if reducing Fallback Triangle Percent helps lessen the difference between the primary and Fallback meshes as well?

[@WilliamFaucher]

The reason is because nanite isn't actual geo, it's what we call virtualized geo. This is the same reason the pathtracer doesn't render the nanite mesh AT ALL. Raytracing doesn't seem to be able to trace against nanite in any way.

[@rossgribben3001]

Hey Will, I notice you use a lot of console commands but I was wondering if I have to reset them everytime I open the editor or if when I use movie render queue they are set, is it possible to set them in a blueprint actor I can drag into future scenes? I feel like that would be ideal as I need the best quality for cinematic shots, maybe that could be your next video 😅

[@WilliamFaucher]

You can add the variables in the defaultEngine.ini file found in the config folder of your project! That way it loads it every time you start the engine.

[@rossgribben3001]

@@WilliamFaucher thanks for always replying Will, you are a wonderful fountain of expert information for the entire community!

[@derptweaker945]

Why did I not check here first. This probably solves my issue. Been looking everywhere but here 😂

[@purplecookie687]

Hey William nobody seams to know this issue I'm having. I have a character who's face is flickering black around the mouth only when Ray traced shadows are enabled. Its animated live through iClone via livelink using motion live and live face app. Any tips?

[@TomMooneyUE4]

Isn't it that the little speckles after fixing the Fallback Error value reduced if raising the two values above, especially the maintained/streaming Memory value ?

[@Osukaani]

Is possible to use Ambient Occlusion when using Lumen? Some parts of my scene looks flat and when I check the view mode to AO everything is white. I tried moving stuff but I got nothing:( You know something about this?

[@WilliamFaucher]

That's because lumen already does AO, it's not a multiply effect like it was previously in UE4.

[@andaron]

one and proper video to fix the issue, thanks you

[@marathon_trader]

Good gravy thank you for this video. I was pulling my hair out over this issue today.

[@zackii90]

Thank you very much for your explanation. that really helped me out. Have a good day sir.

[@habibmensch7368]

thank you for the amazing tutorial! When I use the second method (with the raytraced.shadows.twosided command input) it fixes the issue but not an all meshes and it resets everytime I restart the project. Any clue why this might be?

[@UnrealArtist]

In short, no solution yet. a small checkbox having "use no fallback mesh for shadows" would be a game changer. I mean there is a reason why I am using raytracing and highest quality possible mesh. Thanks BTW, these workarounds are indeed saving the day for many artists.

[@scottcourtney8878]

Thanks for an insightful and extremely helpful explanation.

[@renato-460]

Have you people tried to run UE5 on mid lvl rtx cards? i'm thinking on getting a 3060 instead of a 3060ti ou 3070 because of the extra VRAM, thinking about ARCHVIZ (rendering static images and videos, not for playing games), what you people think ? its really hard to find benchmarks or any information about it

[@mrlightwriter]

I use a 3060 at work and the 12GB of VRAM are really handy.

[@renato-460]

@@mrlightwriter thanks! I've got a alienware with a 3070, for what i'm doing right now its ok, you need to be carefull on vegetation and other stuff, and to export in 4k i'm using the high resolution feature, but its ok, for a nice room i can navigate at cinematic quality with no issues, and I've limited the cpu usage to 99%, so the temperatures are pretty ok, 65ºC maximum

[@mrlightwriter]

@@renato-460 It's great it's working for you! And, let's not forget, a 3070 is more powerful than a 3060.

[@GeneralNovais]

Hey. great video. I have a problem in my project, because it seems that the shadows of the foliage are pixelated, or grainy, I don't know how to explain it, I have an RTX 2070 and my work partner has a GTX if I'm not mistaken, our project is versioned with perforce, on her machine the shadows are correct, on mine she has this problem. I've tried everything and I couldn't find a solution, would you know what it could be? Thanks!

[@mathos83]

William is there a way to switch this on permanently or we have to do this every time the engine restarts?

[@containedhurricane]

I'm also looking for a permanent solution. The problem still exists in 5.1.1

[@yk89031]

Hi, just posted solution for it as a new comment.@@containedhurricane

[@containedhurricane]

@@yk89031 Thanks! Unfortunately, I haven't got time to try it out yet, because I'm still learning Godot

[@marcelogonzalez9565]

Thanks again for another great tutorial. For me, the command r.RayTracing.NormalBias with a higher number like 10 works very good as well.

[@WilliamFaucher]

I cannot recommend this in any way because it affects contact shadows too much which is no bueno. For games this is fine but cinematics? No

[@marcelogonzalez9565]

@@WilliamFaucher Woow I didn't know that. Gracias!

[@kylemcneill5751]

What would you recommend if this is the only solution that seems to get rid of the awful splotchiness. (Even thought the contact shadows get screwed up)? @@WilliamFaucher

[@lifeIsShorts8]

for me solution 3 works but just for a second, and again mesh goes dark. but value of the fallback relative error is still what i changed that is 0. Also i have to do all meshes separately. for ex tree, rocks, house, 50 percent objects are dark in my scene which i downloaded from epic launcher market place( STYLIZED PROVENCAL). Isn't there any solution which will correct all meshes shadow by one click. ? help

[@k_gy_b]

I think you can edit it through bulk edit. I don't know if you still need this a year later 😅

[@BernhardRieder1]

Will, like always great info. What to do if you convert an UE4 to UE5 and you have on the Quixel Assets a Blend Material on it? After converting to Nanite, it appears also black, because the Blend Material isn't supported. What's the workaround? Thanks and keep rocking, cheers

[@WilliamFaucher]

Nanite doesn’t support vertex blending. Youll have to use non blend materials.

[@BernhardRieder1]

@@WilliamFaucher Thank you Will. Makes sense. But is there a way to auto-convert the Blend Materials from Quixel to Non-Blend Materials? Or basically, open a copy of a UE4 project as a UE5 project? Thank you so much!

[@Reverie_Blaze]

Thank you for taking the time to explain this.

[@AcArtGallery]

Hey nice vid! Any idea as to why I can't get any shadows to be cast from an object to the ground? The object responds to the directional light, but no shadows are cast.

[@WilliamFaucher]

Do you have the "cast shadows" checkbox turned on in your light, or your object?

[@AcArtGallery]

@@WilliamFaucher Thanks for responding. I had the quality set to "Low" in the scalability settings, apparently shadows can only be cast when you are at "High" quality.

[@codeFriendlyART]

Thanks, this video totally helped me understand why the error is happening. In my case I opted for turning off double-sided at the moment (since I'm really not using it for now in my current scene) however, I would like to try better the nanite fallback instead. I think in my particular case is not working for some meshes, and I suspect is because they doesn't have appropriate default scale values while imported (I will edit them in the 3D App to rescale to appropriate values and re-try). I'm suspecting this because of your analysis, huge thanks. [Edit] So here is my findings regarding the 3rd method solution (nanite settings) - Your proposed solution totally work in my case provided: The mesh is in a reasonably close distance from the camera _and_ that it's size does not either go less than < 1 or higher than > 3 in scale. If you go out of that scaling range you start seeing artifacts even when the 'fallback relative error' is set to zero. Then, regarding how close to the camera also do affect. If the mesh starts getting far away from the camera, it seem then nanite will simplify the mesh too much or something and you'll get to see the shading artifacts again. Other than this, the only fully working fix is turning off the double sided shading indeed. As this fix is not dependent on nanite changes in resolution or meshes changes in scale, with that one the problem just goes away, but obviously then you loose the double sided shading capability in turn. Hope this info helps around and thanks again.