i just install a fresh 2.81a version of Blender, same problem on my second computer.
I sum up
– fresh install blender 2.81a
– fresh install Verge3D 2.16.0
– unzip blender-material-pack
– append material, assign on object with uv
– Material is visible in blender but not in sneak peek
Same on two computers with different hardware (1080Ti and 970GT).
If you have any solutions, or need more info…
I will be happy to use one of your material on a project i’m working on…