I took an area of Episode One and gave it an ash pass using only several hand-placed ash stain overlays on the brushwork, and a shader that dynamically places an ash layer (blending a diffuse texture and a separate bumpmap) on world geo and models, with tweakable settings for ash direction, amount, transparency and tinting.
Because not a single texture had been repainted, it only took 1.5 megabytes (for a shared masked ash texture and edited stock VMTs) to achieve the result.
Absolutely stellar, this will really come in handy for various unique maps!
missed opportunity in aesthetics, it could be unique feature: ashes weather in videogames isnt rare represented, but extremely rare.
Can this tech be used for snow on props?
You may consider this mod if your question has a gaming or visual purpose rather than a technical interest Moddb.com