In both cases you seem to want to be (permanently) recoloring images, so you'll need jjPIXELMAP. The first one is pretty much the same as the RecolorRain function from plusPixelMapEx, so look there, but work on ANIM::SNOW instead. For the second, I don't think they're covered in that level, but jjPIXELMAP does have both a constructor and a makeTexture method for working with textures specifically.