I am having some issues..... I set up how I want each sub assembly to look like, then bring all the sub assys into one large assy and do a nice render. Now somethimes it works great but then for no reason it will change where basicaly a sub assy will all of a sudden become one colour and I can not change it. Have a look at these 3 renders and you will see what happens to the machine on the right on my 3rd atempt (new line 3). Has anyone else come across this? I try to remove the top level colour and other things but it doesn't seem to work! Going abit nuts.