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1. Rain ripple animated texture creation

   

   Topic by Kratilim · May 2012 · Home› Technical Talk

   Hey, I'm trying to figure out how I would create a looping rain ripple animated texture. Anyone have an idea how I could create such a texture? Here is an example of what I need, I need them at a constant rate, but this movie helps understand what I'm talking about. [ame="…

2. Re: Rain ripple animated texture creation

   

   Reply by sprunghunt · May 2012 · Home› Technical Talk

   You could use pure math to do this. A dot product with a sine multiplied by time might do it. Repeat and multiply this over the surface a few times as distortion and you're done. To make animated maps in max or Maya you can just use a few toruses with an animated radius and render that to frames.

3. Re: Rain ripple animated texture creation

   

   Reply by TorQue[MoD] · May 2017 · Home› Technical Talk

   Thanks Mark! While this effect does look more realistic than ripples, my game has a stylized cartoon look to it so I want the expanding circles specifically. I ended up creating an animation in max and then using premiere to put it all together as a seamless texture. After all that effort though I realized that it'll…

4. Re: Rain ripple animated texture creation

   

   Reply by SHEPEIRO · May 2012 · Home› Technical Talk

   theres three things to consider. 1 - how you are going to approach making each ripple, there are several ways to do this - makes a ripple heightmap gradient, then animate the uvs of a cone so this travels through the poly ring from centre to outside - use a modifier in max or maya to create a geometry ripple - use a…

5. Re: Rain ripple animated texture creation

   

   Reply by Eric Chadwick · May 2012 · Home› Technical Talk

   Blur Studios made a procedural texture for 3ds Max that does this. And it loops, IIRC. http://maxplugins.de/max2012.php?search=animated%20rain&sort=Author We used this for looping rain drips for the Bladerunner game. You can see it in action here... http://ericchadwick.com/img/bladerunner.html

6. Re: Rain ripple animated texture creation

   

   Reply by TorQue[MoD] · Apr 2018 · Home› Technical Talk

   I'm back to attempting to solve the same problem here and have been playing around with multiple different options including generating the ripples with pure math. Getting a single ripple is easy but how do you adjust it to tile? The tutorial that Mark linked to above had a method that no longer works in UE 4.18. Also as I…

7. Re: Rain ripple animated texture creation

   

   Reply by Xoliul · May 2012 · Home› Technical Talk

   I tried to do this for my Brawl entry. I sorta concluded that I'd either have to generate a proper tiling, animated texture like Eric is suggesting, or do it with overlaying particles. You can't have a single ripple texture and randomly have that appear on a surface with a shader. For the particle system: -Get a particle…

8. Re: Rain ripple animated texture creation

   

   

   Reply by RN · Jun 2017 · Home› Technical Talk

   I wanted to try it in Blender, it's not animated though:

9. Re: Rain ripple animated texture creation

   

   Reply by Kratilim · May 2012 · Home› Technical Talk

   Thanks for the tips. I'm looking into doing the ripples as a flipbook animation and incorporating it into my master shader in UDK, this way I'm hoping the ripples will stay on the cheap side to render in real time.

10. Re: Rain ripple animated texture creation

    

    

    Reply by TorQue[MoD] · Apr 2018 · Home› Technical Talk

    Ok so I'm quite happy with the effect I came up with. I may have gone a little overboard with the number of separate ripples in the flipbook sheet (16, 128x128 ripples on a 512x512 sheet at 60 frames of animation means a flipbook texture at 3072 x 5120) but I figured 4 individual ripples on a 256x256 sheet wouldn't be…