After much testing, I think the game is far better off without the improved snow shader, even with all its features. Maybe if Bethesda had developed it from the ground up instead of trying to slap an effect on an old game and trying to make it look decent, it would be fine, but there are so many bugs, it is terrible. It seems that the snow mask and snow rim lighting were created as a way to attempt to mask the issues. It seems to irrevocably disturb surrounding normals in a way that I can't find a fix for. Setting iLandscapeMultiNormalTilingFactor to 1 helps most of the normals, but not all of them. I think that if we could cure the normal bugs, we could figure out how to make it work decently, but I think it will require some extensive modding unless there is some obscure but simple solution. As of now, all it does is waste performance. I get 5% more fps by disabling the snow shader (with all features on with default values) versus with it off.
Yes, it can use a nif for it. Just uncheck the Single Pass box and point to a nif. Mods such as Better Dynamic Snow and (I think) No Snow Under the Roof have changed the shader to use a nif. The snowshader nif uses the existing snow01.dds texture.
skyrim se disable snow shader
Also take note that the snow won't show up in the CK because you disabled "single pass", it will show up ingame though, but if you really want to see how it looks in the CK then just enable that "single pass" again and press F5 to update the CK view, now u will see how the snow will kinda look like, just make sure to disable "single pass" again after ur done looking.
Final edit: I decided to cut the buildings into two, one for everything except the floors, and one with only the floors, on the floor .nif I will remove the "NiAlphaProperty" and use the snowshader.nif from BetterDynamicSnow, since floor pieces generally dont make any use of the "NiAlphaProperty" anyway. 2ff7e9595c
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