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- เผยแพร่เมื่อ 30 ก.ย. 2021
- This week we build on last weeks lesson - using textures and the g buffer to control particle locations via custom modules.
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This is great. Anything with scratch pads is greatly appreciated. Least documented topic in Unreal imo and very difficult
Hey man, havent watched yet. But I love your vids, very informative and weirdly relaxing.
Awesome art of explain things precisely. Thank you Tom!
Hiya Tharlev, great as always. You are right about performance GPU sampling cost almost nothing, but sampling on the CPU would be very expensive. I do wish we had more modules on the GPU like events for example or ribbons. Hopefully they will add them in the future
Do you think we could get a tutorial like this but specifically with eroding/dissolving? It'd be a huge help.
I cover a niagara dissolve as the last example of my intro to niagara course
vid cuts off a bit abruptly, but otherwise loved it! Quite informative.
Started learning Niagara today and wow it's so much more powerful than Cascade, wish I could use it at work
Do you have a video showing how to spawn particles on an animated texture without using the g buffer? I can't find a simple, straight forward explanation on how to do it.
Sadly it’s not a simple or straightforward thing to do.
@@tharlevfx That's unfortunate. I'm new to Unreal and I can't believe how tedious and complicated these setups are. In Cinema 4D, I can set this up easily with a few clicks. Unreal requires far more steps and a mathematical approach. I'm hoping 5.4's motion design tools will expand to make tasks like this more intuitive.
@@kickheavy8982 basically you would need to recreate the animated texture logic in the niagara system and then use the particle spawn position as the uvs. It’s doable but not necessarily simple.
@@tharlevfx Yeah trying to get the logic in the scratch pad to match my animated material is exactly where my brain starts to melt lol. I'm doing a dissolve material that uses a cheap contrast node to keep the edges soft. It's the simplest material setup my brain can handle but the scratch pad doesn't have a cheap contrast node to match it so it falls apart. I'm gonna try to find a workaround. Thanks for the reply man.
@@kickheavy8982 cheap contrast is just a function so you can open it to see the math iirc
Extremely helpful!! =D
Thnakiuu alot
Very helpful tutorial!
any chance you have the spiral handy? It would be greatly appreciated. Thanks for posting such an awesome video!
It’s literally just a helix primitive from Maya with most of the faces deleted and then vertex painted
Thanks for sharing your knowledge!
Maybe I missed this part of the video (or it's just obvious to people who know more than me), but I'm guessing the niagara system won't spawn particles when you can't see the see the necessary part of the mesh. Do you know of another way to spawn particles from a static mesh that allows you to use a mask updated at runtime?
if you're using the screen buffer then it wont work off screen correct - you can however just spawn on a static mesh and sample the vertex colours or uvs and then use that either directly or to sample a texture. it wont work with an animated material though - unless you replicate the animated material math in niagara...
Thx for great tutorial very helpful, sir let me know how to download Niagara Advence Contents map. it's to hard to me for find it. thx again and plz reply
Hey man love your work! - should the Gbuffer method for dynamic materials be working with a material referencing a video texture sample? I've been trying to work out how to emit fluid with a video texture and can't seem to find a solution. (the video doesn't play when I reference it in the niagra texture sample node). any help would be super appreciated (:
It should work yeah, the gbuffer is just what’s rendered on the screen so it shouldn’t matter what the source of the pixel data is, video texture or regular textures
would this work with a landscape RVT? ie) if you were using an RVT to create a mask for a burning forest, could you sample the mask to spawn smoke and embers?
Yes. You can sample an rvt just the same as you can sample any texture. I’ve used sampling an rvt heightmap for all sorts of cool fx
Hello sir> hello can u send me link of file where blueprint and niagara particles are added preset for easy use directly> i want to use it for videos with alpha channel >added as material to a plane> and want to emit particles only from RGB channel of plane material
awesome
hello! can you ex[plain step by step creating particle emitter on mesh plane by video footage grayscale mask with all the steps since empty scene? in this tutorial obviously not all of explanations
have you checked out the first Advanced Particle Locations and Introduction to Niagara videos? they should cover the setup you need.
@@tharlevfx yes, I saw it, but i cant create emitting particles from animated VIDEO mask (external footage) or animated alembic mesh. there is no tutors in this theme.
@@vovainzhenerik yeah they’re very different things I’m afraid - unreal probably doesn’t support alembic or video texture for this sort of thing unfortunately
@@tharlevfx its a bad. but how to create fire propagation on the surfaces with niagara?
@@vovainzhenerik fire propagation is also pretty tricky - you need some way to store how on fire a piece is (usually render targets or vertex colours) and then some way to communicate from what is on fire to what is nearby that could be on fire (usually line traces or render targets). then you just have to connect everything up and make sure it works robustly and without being too expensive on performance.
another queation, what did you used unreal version in this case ?
I’m not sure to be honest, it was a a while ago. 4.7 maybe?
I guess maybe earlier, if node changed to be select node in scrach pad about 4.27.And could I brorrow your last two case file?cause whatever I couldnot restore it,sooooooo confused!!😖Please and thanks@@tharlevfx
Is sampling world position offset possible?
So no, but there’s a workaround. You can sample the original position of the vertex and then do the same math for the WPO and in Niagara, as long as the logic is all the same then the result will be the same and it’ll look correct
How did you spawn without a location module? 11:30
I think that he used the sampled mesh location as initial location in initialise particles
@@flash4297 Thank you!! I was wondering about that!
Did they change the name of the IF node in UE5? It doesnt appear to populate in the scratchpad
Yeah they did, I think it’s Select now
It’s more general case. Select allows you to use an Int for many outputs, If is just a subset of Select with a bool input
@@tharlevfx Thank you so much! I got it to work, i'm having issues migrating the gbuffer. I think it may because the content browser project I downloaded is in 5.1 and the project im using to follow along is in 5.0. For some reason epic wouldnt let me download the content browser project in 5.0.
Your video just spend my time, and i understand nothing from this video. Always show all you steps from start, this why people came here!
Did you watch part 1? If you need to learn more of the basics I’ve got videos about that online too
@@tharlevfx No, I only saw this video, it is important to understand what is from 11 minutes. The particle system in places where the rune is displayed. This is the only video I found and I can't figure it out. If possible, send a link to your other videos about it.
@@tharlevfx So, can you help me, or not?
@@mrcornholio2515 have you watched all the other videos on my channel? You need to learn this yourself