I’m having trouble with the same issue as well. I’ve gotten good results using the “Skeletal Mesh Location” module, but it looks using Skeletal Mesh Reproduction makes the particle material creation simpler. But likewise, I can’t seem to get sampling to work correctly at the moment. If I figure it out I post it up here. If you need an urgent fix, try using Skeletal Mesh Location. If you don’t care about reproducing the color of the sampled mesh, then it should be pretty simple to set up, and uses the same sample regions.