2nd try posting this.... Hi, I am getting a strange result when I use CK to create a static collection(SC) using either HouseK or DecoMain building parts. The material swaps(MS) change drastically. For the HouseK parts they immediately almost all become primary color red, secondary color green. If I cycle thru the MS or select edit base, edit nif, custom material swap, a few original colors remain but most are not the normal options or just red/green. As a programmer/DBA type this looks like some kind of list/array with offset/index error. Any way to fix this, or work around, other than don't use SCs? Thanks in advance, V.