creating 2d procedurally animation flames,

[puddleglum]

i have looked through YouTube and done a lot of googling and maybe im missing somthing but i havnt seen any procedural animations for fire. i want to make it procedural because i will be using it alot and would like it to not look repetitive, and i would like to adjust the values such as wind and speed to create different types of flames without having to reanimate every frame, the only video i have come across that is remotly what im looking for is this video by t3ssel8r

Procedural Pixel Art Fire

which this is some of the coolest programing iv ever seen if it is procedural.
im not looking for a tutorial i just need a starting place, i have done other beginer procedural animation, such as spider legs or tentacles
like this

Procedural Animation: Tail, Wings, Hair, Tentacles! (Unity Tutorial)

so im not a super noob but i cant figure out how to do it on my own and i have not come across any tutorials,
if anyone has found a tutorial i can watch or can give me some insight into how a procedural flame animation would work, it would be greatly appreciated.

otherwise, if there are any keywords im missing when google searching, those would also be helpful.

[Kurt-Dekker]

You got me thinking… I got this effect with a RenderTexture and a paletized shader.

Looks better in motion! No code, just Unity. See enclosed.

If you hack the shader you could make it support transparency and not have black around it all.

8709186–1176612–PosterizedFire.unitypackage (14.8 KB)

[puddleglum]

@Kurt-Dekker

You got me thinking… I got this effect with a RenderTexture and a paletized shader.

Looks better in motion! No code, just Unity. See enclosed.

If you hack the shader you could make it support transparency and not have black around it all.

ill defenitly give this a look, ill try to dissect the code to see what i can do

[Kurt-Dekker]

Play with the color curves and number of particles and sizes of particles and density, etc.

It really affects the “feel” of the flame. It’s a cool effect to be sure… might have to try and tweak it more.

[puddleglum]

@Kurt-Dekker

Play with the color curves and number of particles and sizes of particles and density, etc.

It really affects the “feel” of the flame. It’s a cool effect to be sure… might have to try and tweak it more.

i have already tweaked the particle settings its a really cool effect, but iv been fiddling with the rt and i cand figure out how to get it to be transparent, from the looks of it i think i need the RT to be transparent and not the paletized color but idk i also tried to look into the shader code but i didnt really understand any of it, im gonna go look up some videos on unity shader code, i think maybe a good place to start would be the yt video linked at the top of the code lol

[Kurt-Dekker]

@puddleglum

i think i need the RT to be transparent and not the paletized color but idk

RT is black everywhere except there is flame, so where RT is black (or dark) we want transparent. That means it has to be in the final render material on the Quad.

Turns out all it needed was a clip operation, plus I had NOT set the import correctly for the textures, so they had no alpha anyway… one more way I add value by giving you TWO bugs for the price of one!

Fix enclosed, with updated shader… and a Programmer Art Candle. Hang onto that thing… one day it will be worth millions… of something. You should only light it on special occasions.

8709255–1176624–PosterizedFire.unitypackage (16.2 KB)

[puddleglum]

@Kurt-Dekker

RT is black everywhere except there is flame, so where RT is black (or dark) we want transparent. That means it has to be in the final render material on the Quad.

Turns out all it needed was a clip operation, plus I had NOT set the import correctly for the textures, so they had no alpha anyway… one more way I add value by giving you TWO bugs for the price of one!

Fix enclosed, with updated shader… and a Programmer Art Candle. Hang onto that thing… one day it will be worth millions… of something. You should only light it on special occasions.

yeah i am very much new to shaders so i was looking for a way to create an alpha channel out of the RT grayscale and apply it to the quad
thx i think it would have taken me a really long time to figure this out on my own,
this has inspired me tho to look more into shader coding, its really fascinating and i always thought since i have a 2d game im never going to use shaders but ig not

and the candles to xd