UE4 Niagara Tutorial - Laser and Niagara Parameters - Intro to Niagara UE4/Unreal Engine 4

[@DevEnabled]

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[@KazukiP]

For anyone on UE5 stuck at the 6:00 mark: I think I worked out how to solve no "+" at User Exposed. As it states, "User Parameters are only supported in System Assets".This means In Unreal 5, you can only do this on Niagra **Systems**, which are the things that hold the emitter. Think of it like a painting and a canvas. We are using a Niagra Emitter and we need our canvas to show our painting on. In the explorer, right click on your Niagra emitter and select "create Niagra system" (shown at 7:48) you can then open this and you will be allowed to add user exposed parameters here instead!

[@TabascoDev]

thanks a lot. 😀

[@Youshisu]

yup, much thanks, this should be pinned :D

[@dustercrew]

LEGEND

[@CarisTheGypsy]

I love it when they dramatically change things between versions... Thank you for the info!!!! Absolute legend!

[@ChrixB]

This is by far the best tutorial on how to expose parameters in Niagara, very detailed and so well done, thanks !

[@DevEnabled]

Thank you, glad you liked it.

[@vanityvoodoo969]

Finally a Niagara video. Please do more since the only ones are really very minimal ones which you are then forced to join patreon to see the actual tutorial.

[@DevEnabled]

I hope it was useful. This is part of a small Niagara playlist so you might want to check that out in the channel playlist section.

[@jacobtouchstone5280]

For whatever reason my laser beam is going off at a 45 degree angle and refuses to work with the line trace. I got everything else working except that. Any idea whats wrong?

[@keegantompkins9553]

This video teaches ribbons, beams, and exposing parameters to blueprints. Despite all of that content, it is still simple and easy to follow with an amazing end-product to boot! Thank you so much!

[@DavidGWilliams1981]

Excellent tutorial, good speed, and mostly importantly, it actually worked, thanks so much!

[@cyphermur9t]

18:30 The LineTraceByChannel node doesn't have all those options on the right like 'Out Hit Blocking Hit', etc.. It just has 'Out Hit' & 'Return Value'. How did you get those? I'm using UE 4.26.2

[@DevEnabled]

right-click on the out pin and select split

[@cyphermur9t]

@@DevEnabled thanks!

[@zwww_ee5235]

Why didn't I discover you sooner TvT Such clear explanation and awesome quality!! Can't wait to see more tutorials from you! Gonna binge watch your channel next semester break~!

[@ReubenAStern]

Thanks, I wanted a laser that actually acts like a laser. This niagara laser is way better than my previous one because it looked flat and didn't do as it was told. Your light sabre logic is cool too.

[@wii58739]

Really awesome, well paced tutorial dude!

[@alexandrm3073]

Wow. Have been looking for such tutorial for a week by now. Thanks a lot!

[@DevEnabled]

Happy to hear KZbin revealed my channel to you after just a week of searching 😂

[@etchasketch222]

Awesome tutorial. I needed this a few months ago! Looks great!

[@DevEnabled]

Ah, sorry I was a little late. I usually get a comment saying I was looking for this today, but a few months ago is a bit late..

[@sinksinkswim]

Great tutorial, was looking for a Niagara laser and a bit of logic to set up the parameters so that I can modify them for my needs and this does the job really well!

[@picatsso6721]

Distance and rotation. What I did: Beam Emitter Setup -> Absolute Beam Start(Check), Beam End (0, 0, 999999) (completely ignoring the variable). This gave me what I wanted - a straight laser beam. Changing other parameters in Beam End will give you different angle.

[@picatsso6721]

But the key thing is that it doesn't work with my volumetric fog. So fok it...

[@GoodguyGastly]

I cannot for the life of me figure out Niagra. I'm using UE5 and I even bought a preset lazer beam pack on the marketplace but cant get anything to show up. I get stuck around 3:00 in because I don't have the "view options" twirl down. Any help you can offer is awesome. thank you for the tutorial!

[@blobmon786]

For anyone using UE5, if you can't see the laser after adding the Beam Width dw, he adds an update Beam a few mins later that fixes the issue :D

[@fernandoespinaruiz7277]

Thank you!!!

[@PhilipLemon]

@@fernandoespinaruiz7277 Legend!

[@PormithipicusProductions]

hey since you seem to understand how the E5 version would work, how do I add stuff at the user exposed, I found the tab thing but it doesn't have a + sign, thank you

[@blobmon786]

@@PormithipicusProductions unfortunately I dunno how you'd fix that sorry

[@PormithipicusProductions]

@@blobmon786 that’s lol roght

[@QWERTY-qh9po]

Thanks so much for this video! Great into to the niagera system and what it can be used for. Seems way more advance than the classic particle system i was using before.

[@unrealdevop]

Seems now you have to create the Parameters from the Niagara System that you made from your Emitter. Instead of Vector, you now have to use a Position type. Instead of a Sphere Location, it's now called a Shape Location, which has Sphere as the default value.

[@DevEnabled]

yep. I'll be remaking all of these soon. And more. I'm hoping Niagara will stay at least somewhat the same now. No major changes like in the first few versions at least.

[@unrealdevop]

@@DevEnabled Yeah no doubt....seems like every time an update is released everything is moved around and re-arranged.

[@unrealdevop]

@@DevEnabled Great video btw, simple and effective. I like it better then the material based ones most people do.

[@aaronsimon5527]

For anyone like me who got stuck at the Line Trace By Channel in UE5 - Drag off the Out Hit node and create a Break Hit Result. This should unblock you from 18 min onwards.

[@SicrosEye]

Probably I am too late here but I did it like that, yet no Debug line shows up and nothing is being traced... :/

[@omerhatay2676]

So simple and amazing. Thank You Dev Enabled.

[@DevEnabled]

Thank you.

[@ztormsink5931]

Good video and easy to follow. I'm wondering why the distance (float) does not work regardless of the number a put in and the laser disappear few second after from the world.

[@aivsdeveloper]

@14:59, how did he get his Niagara Laser Impact variable to be a nice rectangle?

[@rupeshmandke]

Thanks for this. Very clean explanation.

[@SotiW14]

Hello, great lesson, I haven’t seen many places how it works, namely the intersection of a laser through static objects, tell me this method is suitable for cinematics, I still don’t understand much about blueprints?!

[@frenchoism]

I've been having issues on how to add damage on laser collision. Niagara does not have event hits on collisions so it seems lime is not possible to do with Niagara but it needs to be hacked somehow. Any ideas?

[@jaxsun2924]

Hi, great tutorial btw. But I cannot see my particle in preview window at all. how can I fix this? UE4.26 engine

[@antonr1194]

on 5.1 use NS insted of NE. It fixes the problem when you can't see the laser after adding the Beam Width and that you can't create user parameters

[@oskartakac2305]

How Im curios. Is posible to damge the player and little bit push him with this niagara system ? Thanks for answer

[@herodev7772]

Hey man thanks a lot for the tutorial! I have the particle system working but i have one issue. I am using it as a laser sight, and when my character moves, the laser jitters and shakes horribly. It's like it has trouble remaining in position. It is even worse when the character jumps. Any idea how to fix this, so the laser stays in position smoothly?

[@blobmon786]

Hey, did you find a fix for this in the end? :D

[@Frog423]

I've also got this same problem, have you found a fix yet?

[@RichardRiegel]

Hi all.. what kind of node is that 'distance' named.... (that black node below the two greens) ...in 16:15? I can't find it from options :/

[@sandras8339]

Drag a wire from the B (green circle) and select "Promote to variable" in the dropdown menu. That creates a new variable which you then rename to "Distance". To rename it, go to the "My Blueprints" tab on the left, under "Variables", find the one just created, select it, press F2 and rename it.

[@RichardRiegel]

​@@sandras8339 oh, thank you :)

[@GameDevAraz]

Hi Any Reason Why The Beams Would All of A Sudden Start Shooting Anywhere But The Point Of The Line Trace Profiles Impact? Thanks

[@PhilipLemon]

In UE 5.1 there is no User Exposed parameters showing as they are in 6:18.

[@KazukiP]

yes also stuck on this!

[@KazukiP]

I think I worked out how to solve this. In Unreal 5, you can only do this on Niagra Systems, which are the things that hold the emitter. Think of it like a painting and a canvas. We are using a Niagra Emitter and we need our canvas to show our painting on. In the explorer, right click on your Niagra emitter and select "create Niagra system" (shown at 7:48) you can then open this and you will be allowed to add user exposed parameters here instead!

[@RMC_]

how did you make the laser able to rotate with the blueprint? Mine is just stuck in the same direction even if I rotate the blueprint.. I went through the tutorial again but I can't see you mentioning it anywhere EDIT: I found the solution online. Check the 'Local Space' checkbox in the niagara system

[@stermano3132]

Do you have an Unreal 5 version of this tutorial by any chance

[@crs11becausecrs10wastaken]

excellent, you've earned my sub.

[@Entolyfik]

Where did he get the TraceByLineChannel setup? (I'm using UE 4.27. I know blueprint settings have been changed since the making of this video). I tried to make it myself, and I cannot get the multi and add floats to connect (vector to float), and that little pin that is off to the bottom, what is that?! I can't even continue, and I want to so bad...how do I get unstuck?

[@liamnelson95TTV]

How could i change the brightness of the laser?

[@charliemason7085]

Very awesome video this helped me out big time with my uni course work, is there anything u would suggest to get this reflecting off items, I've managed to do it with a debug line but its a bit different with the beam?

[@henryqprodllc]

How can you add this to animate in Sequencer for UE5?

[@stevenfodor3022]

Hello, i am curious on how it can interact with the player. i set it up the way you shown but my character can just run right through the laser.

[@OneBravoFour]

Trying to follow through on Unreal 5.1 and that "User Exposed" doesn't allow me to add anything in there. 😞 It's at that point in the tute that I'd given up.

[@KazukiP]

I think I worked out how to solve this. In Unreal 5, you can only do this on Niagra Systems, which are the things that hold the emitter. Think of it like a painting and a canvas. We are using a Niagra Emitter and we need our canvas to show our painting on. In the explorer, right click on your Niagra emitter and select "create Niagra system" (shown at 7:48) you can then open this and you will be allowed to add user exposed parameters here instead!

[@speedistic899]

is it possible to check if this laser collides with a player?

[@jh-lp7cg]

Hi, thank you for the tutorial. Do you have any idea why my sphere seems to be shooting a white laser 45 degrees off into the atmosphere while I'm in the editor, but when I play or simulate, the laser points in a completely other direction? I can understand the forward vector is the direction the laser fires, but I don't understand why there is one direction in the editor and another direction while playing.

[@DevEnabled]

Hey, I think you can see that mine is doing the same thing at some point in the recording. So, I'm not 100% sure why it's starting off diagonally in the editor, I'd understand if it was a straight horizontal line as that would be (0,0,0). But in short, it's just because we've set direction to be based on an exposed variable which in the editor hasn't yet been set so it will choose a null or default value. Then remember we're setting this value only during play through our BP.

[@jh-lp7cg]

@@DevEnabled Thank you.

[@moutrave]

@@jh-lp7cg I've set the LAser beam end parameter to Absolute in the Niagara system and now the beam is not in the right direction in preview but it is when I simulate :D I'll keep digging as well. though this behavior corresponds to what's shown a bit later on the video

[@monkeyprime7193]

great video but how did u create the 'Distance Node'?

[@LegitLord2000]

Figured it out. When you do the Get Actor Forward Vector, do a Vector * Float node, and create your own Float variable and name it distance and plug it in and your good. Pretty much same with the trace end node.

[@kiseli666]

Mi colour is always plain white no meter what I do and what color I put in variable. How did you get that nice glowing color? UE 5.2

[@4ndr3wR]

Check Spelling because it has to be perfect. Make sure you set up Color in begin play and choose the color there - try with both and then with them alone and should get both to work. Make sure you chose niagra systems when attaching them to the target in setting color. Make sure they are systems

[@GaryParkin]

Thank you so much for the video! Great into to the Niagara system. Can you please do more on Niagara?

[@Immortal_BP]

none of the parameters worked, like "laserend" or "color", in the details menu it says "override parameters" and when i change the color there then it changes the beams color, same with laserend. im using 5.0.1

[@QWERTY-qh9po]

Quick Question in regards to this... so the laser color changes but over the course of a second it whites out and looses color. Any idea why or where to look?

[@danielnewman1350]

If you look at the particle count in the preview you'll see that the way he set it up is that he is spawning a bunch of lasers over top of on another. So with the additive material it will change to white after enough layers of particles stack on each other. So to fix that go to Emitter State and change Loop behavior to "Once" and Loop duration to "Infinite" then in particle update there's a setting to 'let infinitely lived particles die when emitter deactivates' So now you're only dealing with one laser beam and you can adjust the color in the blueprint.

[@QWERTY-qh9po]

@@danielnewman1350 Thanks for your response

[@meliodas2177]

running in a whole lot of trouble at the nodes part because in unreal 5 the nodes are totally diffrent.

[@faisalee]

This is awesome! 👍🏽

[@DevEnabled]

Thank you! 😁

[@zakariazeddam1438]

it was really helpful thank you a lot

[@lvl90dru1d]

Good job!

[@mbarker_lng]

Tried this twice in UE 5.03 and nothing. :/ Unsure why.

[@valentindanclaude2209]

Thank you for this great tutorial, it's easy to follow. Do you found out a solution, that the laser draws into a different direction editor/ingame?

[@yuriychemezov]

Did you find answer to this problem?

[@DronX_]

Awesome. Is possible make a flocking system with Niagara? How difficult?

[@analysierer9456]

Thank you for the cool video to expose parameters in Niagara :-) If the laser moves very fast, then I have a 1-2 cm long lateral spread. I tried to set the lifetime in the Particle Spawn from 5 to 1, but that makes no difference. And I can't make the laserend smaller, I tried the Sphere Radius, can you give me a tip here?

[@mo-dev]

apart from the beutiful tutorial, how come your Ue4 looks like Ue5 with the blueprints and such?

[@DevEnabled]

flattery will get you answers. Google Minimal UI for UE4. It should be one of the first git repositories.

[@mo-dev]

@@DevEnabled Amazing! Thank u!

[@LegitLord2000]

Tried to use a color curve to have multiple colors and screwed myself lol Idk why it won't work omnaggashdfgasdhfgvd I missed the most important step. Setting the color parameter, i'm like omg hours of work and my laser is invisible and won't work

[@pullsardev]

Thanks!

[@SAYRESS]

well, my LIneTraceByChannel doest have same pins...

[@SAYRESS]

so if someone have the same problem - just right click pins from right side and you will find a way.

[@喵星人的涂鴉]

Regarding the problem of Laser not following. Attribute CPU, do not check the local space. The Absolute Beam End in Beam Emitter Setup needs to be checked.

[@ohtontheknight3879]

Now i can make my laser mines

[@iliasiosifidis4532]

cant find the "logic" that you copy pasted, also cant make the laser turn like in the intro

[@robertbowen2075]

Your laser beam is generating light and looks thick and full. I appreciate this video is old but I made a laser with the same settings and it doesn't look like that.

[@meharislive1]

Hello Sir I Need Your Help in Unreal Engine 4

[@sebastianwest828]

thx

[@Zero_hk]

is there anyway the end of the laser be a simple dot?

[@pawnix4122]

Doesn't work for UE 4.27.2. RIP

[@SuperlativeCG]

I got it to work in 5.0

[@EvillNooB]

this tutorial is kind of confusing, you over explain everything in the beginning(so i thought that it's for complete beginner like me) but in the middle you're like - let me copy paste those 6 nodes real quick

[@Hasmatix]

youre voice is really low

[@pryzmgaming]

Old video and probably wont get a response but, i am using this in a 2d side scroller and it works great with a hard coded end point, but when adding the code to check for impact location and Trace End location the beam from my trace starts going sideways in the y direction, how could i lock it to X Z only?