Can Niagara emit particles from a mesh volume

In the Skeletal Mesh Location Module, I found a “offset position along sampled normal” parameter. On this parameter I use a “Uniform AOr BFloat” and make the A value a random(how far it follows the mesh back on the normal).
But thats also not really the result I am looking for, because at the example crow picture, you can see that at the beak and feet it is fine, but the belly area has a bigger volume and it looks a little bit thin.

I guess I look into blender, maybe I find how they calculate the points in the mesh volume.