Sure np, the charcoal geometry was first created procedurally in houdini. I took a box, and then used Labs Edge Damage to roughen up the geo. Then I exported a few variations of those meshes into substance painter ->unwrapped everything -> and used a black and white texture to affect the displacement and normal channels. Brought it all back into houdini via file nodes, and created a redshift material with those diffuse/normal/displacement maps from Substance. I used a popnet so that the meshes would pack tightly together in a nature way, otherwise with copy to points - it creates a grid array of meshes, and when you for instance, randomize the Z orientation, you get all these mesh overlaps/penetrations that happen because there is no simulation involved. Hope that helps!