advanced rendering for AutoCAD
First, you have to create your materials in subfiles.
Then, once you open the master, you will see them.
From that moment on, you edit your materials in the master only, materials will not get lost, but remember - changes in material definitions made in the master will not reflect back to subfiles.
Tried them and both methods work. I guess assigning materials in the subfiles would be the more conservative method since I recall losing material definitions in AR4 when links were problematic. On the other hand VISRETAIN would be a much easier method. Thanks again.