Speed Up Renders in Blender (Cycles)!

Nobody likes waiting for renders. In this lesson, we’ll talk about a few different ways that you can reduce your render times in Blender.
⭐ Streamline Your 3D Workflow! ⭐
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[@bDwS27]

I'm so glad he talked about tile size! I've been wondering about that for a while.

[@Chribit]

JO! that auto-tile-size add-on just completely saved my ass! THANK YOU SOOOO MUCH!

[@oluwatoyinbenson9016]

And now, there's DENOISING!!!

[@krzysztofjuszczak906]

Toyin Benson even better now

[@MrAnvith1993]

hey you can try Nvidia optix denoiser.... its awesome try it for blender :)

[@edsknife]

Finally

[@lucutes2936]

and it even improves performance

[@johnaart]

@@lucutes2936 But does it keep detail?

[@onkardomkawle3469]

You have no idea how much you helped bruh! Thanks a bunch. Saved me 64 hrs.

[@djvv4049]

Thank You, Worked great. Went from 40 or so seconds a render to little under 6 seconds. Cutting the Samples down helped a ton!

[@ANF6000]

Thank you for the tutorial! I walways forget the lights when optimizing my scenes. This scene lends itself to the modifications you made, but anything lit in daylight or an interior would probably come out dark in the corners and creases without all those light bounces.

[@SinanAkkoyun]

60*6÷6 xD Really good tutorial! I thought the Light Paths doesnt affect it too much

[@fredmcveigh9877]

Very Helpful stuff. If no-one else mentioned it I remember reading somewhere that tiles should be set at multiples of 8 for example 64 x 64 , 256 x256 as these are numbers that processors work best with due to 8 bits in a byte .

[@figarybka1393]

Taking "Spatial Split" BVH could also potentially further improve render time of presented scene. It speeds up bvh tree traversal when small faces are in proximity of large ones.

[@henrikd.8818]

You could bake your lighting in static scenes to render your scene even in realtime. Thats great for animations because you render once and that just do your camera animation stuff and so on. Of course the downside is you have to rebake the whole scene after one change in lighting and so on.

[@heveycreations4197]

You have made my life easier, thanks !

[@MichaelPeterDalsgaard]

Great advice. I tested this advice and also adaptive surface subdivision to cut down the rendering time of an old model from 45min to 8min.

[@blenderm4n]

Nice video, although the part about multiple importance is a bit false. 1. Without an HDRI (but a solid color) multiple importance makes no sense as it uses the light information of the HDRI to calculate where to spend more calculations on and where to spend less. Solid color is the same at every angle so it doesn't need that. 2. The resolution option doesn't controll the resolution of the HDRI but the resolution of the map used for thius calculation (generated behind the scenes). So higher resolution means less noise but higher memory usage. correct me if i'm wrong

[@RemingtonCreative]

You're completely right. The reason I enabled multiple importance was because it's a good tactic to reduce noise in general, I didn't really mention that though. Thanks for helping :)

[@matteo_petruz1435]

@@RemingtonCreative i have CUDA out of memory broblem please help meeee my garpics card 1050 ti thanks

[@dirkvandenberg4164]

Thank you for the video! I currently work on the animation and video editing for The Bluemilk Podcast. I use Cycles for everything, and the biggest pain has always been the render time. We're currently working on getting a better video card, since 2.79 no longer recognizes the old one. Anyway, thanks for all your videos. Subscribed!

[@Muuip]

Great Info! Very useful.

[@danielgray4239]

Knew the rest but didn't know about the auto tile size, Thanks for the tip :D

[@pozdrower]

super knowledge. THX

[@DerperDaDerpa]

Perfect the auto tile size is new, also ill have to try reducing the number of bounces and click the "multiple importance" box on my lights, thank you great bit of advice.

[@kilonaliosI]

I use Unreal Engine 4 for my renders. It's physical based like cycles but with two notable differences a) no fireflies or noise b) zero render times. Could not have been happier.

[@amateurfilms8188]

Thanks man, I needed this. I have been rendering a scene with 180 frames for the last 16 hours or so.

[@edsknife]

Blender rendering has good scalability with multiple GPUs, but viewport doesn't. I'm studying Blender because it's the best way to reuse old graphics cards. This is the most useful video I've seen yet

[@WujaszekDracul]

From 12 minutes to 5 minutes! Thank you!

[@pratikdahale3304]

WOAHHHHHH!!! Works great! Thanks for the guidance!

[@TheLotw]

Install the free included plug-in, Auto-Tile Size and it will automatically set the tile size depending on your CPU/GPU, size of scene, etc..

[@RemingtonCreative]

+TheLotw I went over that in this video, actually :)

[@nizarlahmar1431]

Thanks for showing us the AUTO TILES add-on ! It helped a LOT ! (i'm using an Intel Atom CPU)

[@5h0ckblock]

What you really want to do with your samples is to set them to a lower number like 30 and go to your scene tab and turn on denoiseing to remove the noise and keep your quality. That really helps the render time

[@tereza_aa]

For my 1st GFX it took 7 and a half hours to render and I didn’t even realize it was TOO light 😔

[@kraftykritter10]

Im using a crappy laptop to do my animations but will get a good pc in the future. I didnt skip and actually watched this twice lol! Thanks for this tut!

[@-eternal]

Worked well, thanks!

[@BlenderRookie]

The auto tile size works well with a GPU but doesn't help at all with CPU. In fact, it makes mine slower. For mine(i7 4720hq), the best tile size is the smallest tile size I can make that still retains the frame dimension ratio. For example, if I am rendering 1280x720 frame, my tile size needs to be 16x9. If my frame size is 1920x1080 my tile size needs to be 48x27. I spent several hours one day figuring this out. It still make little difference on small frame sizes but on HD and 4K it does make a noticeable difference.

[@alexandreriou1577]

Blender Rookie no it's just tile sizes need to be different for gpu and cpu because they don't work the same. For gpu, the best tile size is 256x256, the best for cpu is generally 16x16. blender guru made a video about that if you are interested.

[@BlenderRookie]

16x16 is not optimal unless you are rendering a square frame. I can prove it. Pick one of your projects and render a full HD frame(1920x1080) with the CPU and set your tiles to 16x16 and time it. Then set your tile size to 48x27 . Rerender it and it will be quicker than 16x16. Granted it will only be slightly quicker but it will be quicker.

[@alexandreriou1577]

yes im just saying a general rule of thumb is to set it to 16x16 for cpu, so you don't have to calculate the ratio every time. I use GPU anyway. BUt thanks for the info, i didn't know about that!

[@BloodyRainRang]

The best is to just benchmark it yourself, there's no universal setting for either and what works great for one person can be horrible for another. Best example, I keep seeing the recommendation of using 16x16 for CPU and that does beyond horrible compared to 128x128 for me.

[@RemingtonCreative]

+BloodyRain2k What this guy said ^^ every processor and GPU has a different architecture that results in better or worse performance under certain circumstances. I feel like a big misconception came from Blender Guru's video where he shares his own results, but that's only with a single set of hardware, and doesn't accurately represent the population. So do your own tests and find what works best for you.

[@SerenaFate]

Huh, interesting. Didn't know about "Auto Tile Size" so far. Just tested it and at first I thought it doesn't work for my system (5820k, 2x 980ti), but the suggested tile size of 960*540 (target 1024) for a 1920*1080@100% scene turned out to be faster than my usual setting of 512*512 by around 6%. Not huge, but still an improvement. Other settings: 12 threads, Bottom to Top (for me 10% faster than Hilbert Spiral, Image Draw: GLSL (shaves off 20% vs. 2D Texture) My system profits a lot from large tile sizes: 960*520 (target 1024) 1:12min 512*512: 1:16min 480*360 (target 512) 1:20min 256*256 1:31min 230*216 (target 256) 1:32min (simple scene, but with waaaaay too many shiny faces) So thank you for making my renders faster again :)

[@Red-Magic]

Improved my time for a render from 2:31 to 1:15 by switching it from CPU to GPU, and it dropped to 1:08 after your light paths optimizations.

[@RemingtonCreative]

+Magic_Zach :)

[@dipteshchoudhuri]

The turtle made my day

[@damiancowley5730]

got up to about 9 mins and all i need. cut about 8 mins off my render time and only using a gtx 460. but even then some of my renders takes an hour and im sure this will help heaps. thanks mate

[@damiancowley5730]

PS. subbed

[@mayny03]

very helpful. Thanks

[@fahadhasn]

Using Branched Path Tracing in Sampling tab>Path Tracing drop down will faster the render as well

[@DarkToast121]

Why u didnt use clamp settings?

[@RemingtonCreative]

+DarkToast121 gahhhh. I forgot about that.

[@MustafaAli-nv3ig]

clamp will not reduce render time i think ...

[@DarkToast121]

Ofc it reduce the rendertime.

[@LordOdin]

clamp increases render time but makes it so you need less samples for a final render

[@DarkToast121]

so in the end it reduce the rendertime.......................

[@arianullah6257]

Way to speed up render in to use the D-Noise addon from Remington Graphics :p

[@Rocketman1105Gaming]

I am not entirely sure what the difference is, but most of the time changing the sampling pattern from Sobol to Correlated Multi-jitter helps to clean up my renders just that extra bit more at seemingly no cost to the render time.

[@navarreitor]

Auto tile size!!! Thats great dude, thank you !

[@KaidoLP]

Filmic blender can help a lot too, by reducing the noise in the image and therefore allowing for less samples.

[@RemingtonCreative]

+Kaido1 What's that?

[@RemingtonCreative]

Ohhh. Filmic Blender. Filmic doesn't do much about light physics. It's just color space. It won't speed up or slow down your render times noticeably. However it is a great thing to use.

[@KaidoLP]

not quite as it changes the color space as well as some other things in a way that makes shadows much brighter without clipping the highlights. that allows for less samples, so it doesn't speed the render up but if done right improves noise levels PS I messed the name up the first time

[@bananaboy482]

Dude, wow. This is amazing i'm so glad i clicked on this

[@supahfly_uk]

Can you explain why gpu and cpu renders look different.

[@suomesta9629]

They shouldn't really. Unless you are rendering stuff with SSS, or some other material/technique not supported by some GPU's yet.

[@RemingtonCreative]

+Suo Mesta CPU rendering also toys with particle systems sometimes. At least, it has in my experience.

[@suomesta9629]

Found the feature comparison list in Blender docs: docs.blender.org/manual/en/dev/render/cycles/features.html

[@bruh-qi7ue]

Supahfly Adrian it depends. Some amd gpus arent compatible like mine. But I modified some stuff for it to work

[@suomesta9629]

Buildpucipuci02 What did you modify to do what?

[@YegorSmirnov]

The reason you've got the render slower is because you enabled Multiple Importance on the World. It should be enabled for an hdri only, not for the constant color or Sky. And yes, auto tiling works not the best on my tests. I came up to 16x16 for cpu and 256x256 on GPU

[@jeffreyestrada326]

this video saved me 3 minutes per frame!

[@aarongwynaire7970]

Love it :) definitely using this for my game :)

[@lautaronahuelperuccajover7455]

Great tips!!! Thank you! PS.: I'm a dedicated viewer! :V

[@noahl420]

Love the new intro!

[@Kingofsnow]

JarJar at the end tho lol This was actually pretty helpful thanks!

[@oriolonbass]

OH MY GOD your backgroun 😱 I love Firewatch

[@RemingtonCreative]

+TheWolf :D Hehe. I knew someone would mention it!

[@oriolonbass]

Remington Graphics could you do a game engine tutorial? I would like to try to make a game, but I don't know how...

[@RemingtonCreative]

+TheWolf :D I'm not too good with Blender's Game Engine, but I might still give it a shot :)

[@jeffg4686]

So much was about performance as little as 5 years back. Now, that's just about gone! with the denoise, good renders in seconds.

[@simonrazer8303]

Why is there no discussion section on your channel? I think that would be pretty handy for general questions.

[@RemingtonCreative]

Simonrazer That's something I've been thinking about recently. thanks for the tip!

[@VIPLonda]

Very helpful video

[@sonofhendrix1618]

The best tips to improve render speed. Buy a faster GPU and ideally more power efficient GPU which will also save on your electricity bill. Also there are some fantastic free noise reduction tools that run as a post process after each frame they require a little bit of setting up in terms of render settings but when i was into Blender about a year ago i used them with great effect, you can massively reduce your number of samples and still get a clean image. Sorry i can't give links and be more specific its just that i have forgotten the details it was a long time since i used it.

[@higurro]

Wow, my quick test render went from 23s to 9s just by clicking into GPU mode!

[@moade333]

Note: don't touch light path with clouds. You deserve a like.

[@mirkocaccia3846]

Great tutorial, tnx! Please, can you share that scene? I want to render the same scene and see the difference with my render time

[@ron.1738]

Thank you

[@LinkieLinkGameing]

Dude this is amazing! it sped up my render times!!

[@keterbinah3091]

every blenderist knows 256 is the optimal tile size for any gpu

[@donutsmashers6169]

THANKS A LOT!!!

[@benediktkraas8576]

WTF this is AMAZING

[@monkeykidstv6343]

It really help, it make me 10 time faster, but now we need to apply denoising under render layer panel, it take more 1/3 render time.

[@Valpskott]

After you changed the lights (to 4 bounces + Multiple Importance) one of the light-panes showed up in the reflections of the floor.

[@RemingtonCreative]

+Valpskott Yeah, that's because I also misclicked and changed the strength up to 10 instead of 3. But multiple importance will make lights appear in reflections, just so you know.

[@sudeshfadkale9691]

i really like your desktop background. where did you get it from though?

[@TheImmortalLEGO]

Cant tell if u r joking, it's a game called Firewatch tho :)

[@USER-AlbertIvanovich]

Thank you so much bro!

[@IshEaterson]

After step 4 is that blue pane in the ground reflection the light? That wasn't appearing before adjusting paths...

[@SaintMatthieuSimard]

11:30 LMAO good one buddy x)

[@averyhall4079]

Thanks for this video. It really helped. But did you make the model of the prince yourself? If you did do you think you could do a tutorial on Character design like that? Or if you downloaded him can you tell me where you got him.

[@RemingtonCreative]

+Frici I made him using a software called Make Human. You can create simple people quickly and easily. It's nice.

[@mutedsounds2k]

What about Clamping? I guess that's for reducing the fireflies only. Moreover, I think that a Filter Glossy value of 2 is a bit exagerated. I'd go for a value between .5 to 1.

[@karungany6968]

loving the intro

[@RemingtonCreative]

+brian karungany Thanks! I'm probably gonna make it different for every video, just to spice things up.

[@karungany6968]

and the video to…thanks a lot

[@Bob-321]

My full resolution render went from 25min to 2min. Thank you.

[@MirekFe]

Hi Grant. At the end of the video, you asked for tips and tricks on how to lower render time. I was wondering if you could test OpenGL rendering with the GPU to see how fast you can make the render time and maybe even record a video of this attempt? There is a KZbin user who has done this already (cfirwin3). A devoted viewer and now subscriber, MirekFe. :-) P. S.: Cfirwin3 made a tutorial series on OpenGL in Blender, called 'Hacking the Viewport'.

[@GlatisFX]

Thanks so much :3

[@ShakingMadDavid37]

Can you help me understand and possibly fix the problem I am having with a simple animation playback of a slightly distored cube with a few modifiers on it? I would really appreciate the help! 🙏

[@Denka_]

Thanks bud

[@MrZakousky]

WOW !

[@leatherandpoemscharmyman5774]

hi , I have a problem.... I have an scen with 84.000 tris and my resolution is 400 x 300 px very very low to test.. ...really and I follow this settting , and everyframe in verylow res, used to have 2:04 , I am wrong with something? I have a 960 gtx .

[@nizostyle]

Thanks! From 1 minute to 12 seconds.

[@onlyeyeno]

+Remington Graphics Nice video, though it would have been interesting to see a detailed comparison between the resulting renders, just to see what if anything differed. It could have helped us to choose "how far to push the optimizing" depending on what we are "shooting for". Maybe next time ;) Best regards. P.S. Would also have been interesting to see what had changed if You had used "experimental featureset" both for renderspeed and "image quality". D.S.

[@RemingtonCreative]

+onlyeyeno From my observations, barely anything changed from the first render until I enabled multiple importance. You can kinda see it in the video, but not too well. Definitely something I'll consider if I do another video like this :)

[@jaycehfilms8741]

CUDA actually has huge problems if you want to render out big scenes due to many graphics cards having very limited memory

[@RemingtonCreative]

+Mediacs All ya have to do then is simplify your scene!

[@Zerotwostudio]

You can render by layers to speed things up especially with big scene.

[@dokerb3d60]

Use Spatial Splits actually increase render speed?

[@mckrokonus]

I noticed that reopening blender and your scene, can improve rendertimes if you've been working on it for a while, dont know why though.

[@Venorized]

I think it's because it still has saved the steps you made so you can undo them

[@RemingtonCreative]

Very interesting. I'm sure Venorized's explanation is accurate. A few other data caches might be wiped as well.

[@Venorized]

I once had a problem where I added a song in Blender and after some further steps Blender started to lag. I realised that my cache went up about 200 Mb after every step and it already was some gigs big. I couldn't figure out what the reason was

[@Venorized]

But after reopening the project the cache was at 0. But still the problem was there

[@kevintran7208]

My theory is that Blender partitions a portion of your computer's resources when it starts up so as to not disturb other programs as much. It used to say how much memory it reserved in that 2 second console window but I haven't seen it since 2.76. I'm not sure if it really works/helps but my ritual when running long renders is to close all background programs, then restart blender and just hit f12.

[@timedriverable]

What desktop computer would you recommend on a budget thats not a killer game machine?

[@jasonlor9735]

I just realized this is for 75 samples of the scene. It does make sense, but I guess it's just me being impatient. Good video, btw.

[@Synapticsnap]

Bravo!

[@apokoarts2636]

on the gpu render i see open cl but when i try to render image, it will crash

[@josephbrandenburg4373]

APOKO ARTZ Check and see if your card is supported. Sometimes built-in chipsets will try to use OpenCL even when they can't.

[@apokoarts2636]

okay thanks :)

[@andrewtheawesome3296]

thanks, this helped alot, but what about the grey rectangle on the floor at the end??

[@RemingtonCreative]

Andrew the Awesome32 If you watch closely, I accidentally misclicked and set the strength of one of my area lights to 10 instead of 2. Good eye though!

[@mx-dvl]

Andrew the Awesome32 is there a way to get rid of area lights visibility through transparent materials or reflections?

[@andrewtheawesome3296]

Maxime Madeck I have no idea. I'm not much more than an ametur at blender. I'm sorry. you may want to ask Grant from Remington graphics (the guy who made this video). He is quite familiar with the software and could probably answer your question.

[@domanickharper]

tried number 3, and I had like a million fireflies. I don't see CUDA for me or OPENcl, only OPEN MP

[@Science_36014]

sir, I have i5 4440 3.1 Hz + GPU 1660ti when I render an animation in blender it takes too much time how to solve this problem even if I have already selected my GPU in preferences setting

[@Moonchild99.]

I changed CPU to GPU on my laptop but it still takes forever. Why?

[@adamdude]

can you please tell me where you got that desktop background from? it's awesome!

[@RemingtonCreative]

+adamdude Look up Firewatch background on Google Images. Should be one of the first options.

[@paint.things-paintscreen]

7:00 at that moment when I activate this my blender is slower than in the 3 render

[@-webster3120]

I did a render of a beginners cup, a plane and a light. 50 samples. 33 minutes! what am I doing wrong?

[@TuRmIx96]

Is this a private project or can you share the file with us? I'd like to compare my PC's rendertime. Thank you in advance :)

[@ChristofferLund]

blenchmark.com/

[@johnbernard17]

*I have a question to ask you, When ever I make a sculpture of an animal using Z-Brush software. Can I transfer it from Z-brush to blender so that I can add bone tools to the character by bring it to life?*

[@RemingtonCreative]

johnbernard17 Just export it as a .obj or .fbx file and then import it into Blender!

[@johnbernard17]

Thanks

[@chapstickwarrior9277]

Damn, you could probably render a short film in a day with your setup.

[@captainghost9593]

Can I get link of your wallpaper?

[@necross_official]

In the beginning when you show the default render settings, you say you're rendering at 960 x 480 resolution... but you're settings say 50% of 1920 x 1080 - isn't that 960 x 540? ;) Never mind, still good hints in this video for people who want to speed up their render times.

[@RemingtonCreative]

+Necross gahhhh, sorry. Messed up the math there.

[@jaysworkshop7573]

250k faces high poly? huh..im rendering a scene with 15 million faces..heehhhh.

[@rolandrickphotography]

Jureil , link please.....! 😘🖖

[@gerardtaulats5973]

Can't it be because you didn't optimized the scene? I can't imagine an scene where all those 15 million faces are worth it. You should downgrade the farest models as they won't be noticeable in the final render. I say it just because to save you hours of render time.

[@mrgeniasworld4374]

@@gerardtaulats5973 Or Days...

[@vincenzo3574]

select all, add modifier, decimate, half the faces, and i can grant you won't notice a difference (Yes, i know it's old but i still wanted to say this)

[@Crazylom]

100k Is Top of performance for me :(