Getting warning saying "could not copy vertex weights to HD objects" on a couple objects when importing an HD export in Blender

[Aaron J. Olson]

Hello, I have tried Googling this issue to see if anyone already had an answer. I have a model with several pieces of clothing. The base model is an HD model with a couple levels of subdiv, the clothing is either at 1 subdiv or base (because there is no subdiv available, it is not an HD object). There are a lot of clothing objects on the model + some geografts. When I do the HD export it exports with no error. When I import into Blender everything comes in fine, except that I get a warning about “could not copy vertex weights to HD objects” on a couple clothing items. There are 12 other clothing items on the model with the same settings (as far as i can tell) that are transferring over fine. I have no idea why and I am trying to debug it. Anyone have any suggestions for things I could try?

[Thomas Larsson]

It means that the generation of multires levels failed. Vertex weights can only be copied between meshes with the same number of vertices. A HD mesh with multires has the same number as the base mesh, but a true HD mesh has more vertices.

[Aaron J. Olson]

“Vertex weights can only be copied between meshes with the same number of vertices.” - This is very useful to know, thank you.

”A HD mesh with multires has the same number as the base mesh, but a true HD mesh has more vertices.” - yikes that is confusing lol is there a way to determine which is which ahead of time (multires-HD vs True HD) on the DAZ side or do we just have to debug this error in Blender at import time?

Thank you for the info Thomas. I was able to resolve the issue by reducing the subdiv level on the problematic clothing items to 0 and then going though the HD export process as usual. With the subdivs set to 0 they imported with the transfers correctly. I will mark this issue as resolved.

[Aaron J. Olson]

resolved