PBR Does not support textures without copy/transfer permissions- BP does.

1. Rez or create object/prim.

2. Apply a PBR material.

3. Attempt to apply any texture without both copy and transfer permissions to Base Color, Normal, etc.

4. This action is forbidden

5. Switch to Blinn-Phong

6. Same texture can now be applied without issues

Why would this security feature be enabled for PBR but not Blinn-Phong?

In what way IS this a security feature?

The creator of an old set of boots kindly provided me copy/mod/no transfer versions of the normal maps for their boots. I applied a new PBR material of my own but wanted to add the original normal maps for additional detail. It would be a major security concern if creators had to give out copy/transfer versions of their textures to allow more involved modding and customization.

https://secondlife.canny.io/admin/feedback/bug-reports/p/pbr-does-not-support-textures-without-copy-transfer-permissions-bp-does

Reproduce the six-step case in the issue, comparing PBR and Blinn-Phong materials with textures lacking copy and transfer permissions. Trace where each material type checks texture permissions; done means PBR permits the same legitimate texture use as Blinn-Phong without weakening asset permissions.