snow on non-hmp surfaces

In "Example Scripts" "weather.c" shows how to make snow appear to stick to the surface of a single hmp. How can we make snow appear to stick to surfaces of a large outdoor level composed not of an hmp but of models, wmb entities, and textured blocks?

access the skin of the object and use pixel instructions to paint it. I assume 80% of the modified code would be exactly the same as the weather hmp version.

I wouldnt suggest going down that road if you're a beginner.

I havent seen painting on WMB blocks yet, but it could be possible, I'm cant say for sure. You can paint models, but you have to create your whole level out of models...

I would suggest building your core game and after your whole game is complete, aim for the environment impact and small details and weather...

Thanks Malice and Epsilon. Seems there should be a way to paint pixels on blocks as well as hmp's and models, doesn't it? I appreciate your suggestions.