Wetmap Tears
Film/TV

Learn how to generate wet maps efficiently with Copernicus. This example file walks you through the process of generating a simulation that we then bring into Copernicus to generate a wetmap. This is incredibly efficient as you can generate high resolution wet maps without needing high resolution geometry.

The character in this file is made available courtesy of Tumblehead x Christopher Rutledge ; Jimmy is the protagonist of their short film Turbulence, presented by SideFX.

(2 responses)

Asset Type
Scene File | HIP
Published
July 8, 2024
Terms of Use
Standard License
Created in
Houdini 20.5
Categories
Copernicus
DOWNLOAD SCENE FILE [875.0 KB]

COMMENTS

  • g_bergot 4 months, 2 weeks ago  | 

    Thanks for this hip, really useful and so light to compute! Love it. I just have one question, what if I want to use a vector type vdb (to import color for example)? It works fine for scalar vdb fields, but the opencl script would probably need some modifications to work with vectors, and I don't know anything about openCL... any idea?

    • Tom_SideFx 4 months, 2 weeks ago  | 

      it would work just the same, just make sure you assign it to a float3 variable instead

      • g_bergot 4 months, 2 weeks ago  | 

        Ok, I tried to adapt your code a bit with my very limited knowledge about opencl, but I'm still gettin an error message saying "@Cd is unavailable: Must be Run Over Volume or VDB." I set my inputs / outputs accordingly before running the new script. I sent you some discord messages to discuss more about it if you want :)

        Here is the script I used:

        #bind layer src? float3
        #bind layer !&dst float
        #bind vdb surface float port=sweatvdb
        #bind vdb Cd? float3 port=Cd

        @KERNEL
        {

        float3 worldpos = @src.xyz;

        float sample = @surface.worldSample(worldpos);
        float3 Cd = @Cd?.worldSample(worldpos);

        @dst.set(sample);
        @Cd.set(Cd);
        }

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