Newer V-Ray versions prefer .vrmat files. If your 1828 pack contains .vismat files:
Instead of manually setting up reflection, refraction, and bump maps for every surface, this library provides ready-to-use assets for nearly every architectural need: 1828-mat-vray for sketchup
Have you used the 1828-mat-vray pack? Share your renders and tips in the SketchUp community forums. Newer V-Ray versions prefer
The 1828-mat-vray material is a "light eater." Because it is so dark, it absorbs most photons. You must adjust your lighting strategy accordingly. and bump maps for every surface
