Any way to change the interior color of an object? Black was there by default and I can't figure it out. I am using version 17.5.327 (Apprentice). Thanks!

Yes. When you fracture an object Houdini should create groups for each of the pieces, plus two groups called: inside , and outside.
Or you can create your own groups based on your pieces. Using these groups you can then use material sops to only affects certain groups. Cheers!

Kate Xagoraris
Yes. When you fracture an object Houdini should create groups for each of the pieces, plus two groups called: inside , and outside.
Or you can create your own groups based on your pieces. Using these groups you can then use material sops to only affects certain groups. Cheers!

Thank you!