Jump to content

Voronoi Messes Up Normals

Recommended Posts


I have a model that renders fine unfractured, but once I've fractured it, I get shading artifcats from bad normals. It looks like Houdini is inferring normals for the new vertices by interpolating between neighboring ones, but it's not looking right. I've tried using an Attribute Transfer SOP to take the normals from the pre-fractured model, and it helps a little but doesn't solve it completely. Also tried the cupsing settings on the Facet SOP and Vertex SOP. I'm stuck. Does anyone have an idea how to fix this?

I'm not doing any fancy fracturing, just the RBD Material Fracture node.




Edited by jamesearnest244
Link to comment
Share on other sites

I would try and do the fracturing myself, either using boolean fracturing or Voronoi fracture and see if it helps. The RBD Material Fracture is a high-level node that does many different operations inside, but your geo might be a bit special, so it won't work in your specific case. Voronoi Fracture and Boolean fracture do have some options regarding the treatment of normals. 

Alternatively, you can try creating new normals for the geo before fracturing, maybe those new normals are in a better spot for RBD Material Fracture to work straight out of the box.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...