I got a new computer, backed everything up from old one.  Installed HDP 2021 onto this computer, transferred my license number.  Imported files.  Everything was going great until I did a 3D rendering of my build.  The roof, pool, some of the block walls, some tables, posts, etc. are just a solid black color now.  I tried to change the roof to red shingles just to see if it would refresh, but it didn't.  I checked some older versions I had saved, same thing with those.  Any ideas?  It's a better computer now than old one, so doubt it is hardware that can't render.  Maybe a setting or update I need to do or something?  Attaching a screenshot.