I created a rock with 3dsmax and Zbrush I textured it with substance painter / I then imported it into unreal engine 4 / I used the vertex paint system to paint the snow / I did not push the snow quality, I just wanted to test the paint in 3d .. I used a source substance and the tesselation system as well as an instance to give volume to the snow :) ///
Snow paint in Unreal Engine 4 / Vertex paint ///