If I use a large box mapping on the railclone object, say 10000x10000x10000mm, will that give a 'seam' part way accross the panels of glass every 10000mm?
Yes. The mapping works as applying a UVW map modifier to the full RailClone object, instead to each segment.
I need each pane of glass to have completely different UVWs so that there isn't a smooth bump (in the reflections) from one pain to the next. The UVW almost needs offsetting randomly from pane of glass to pane of glass.
Yes, it can be done with some tricks:
- Create two materials in a multi-sub. For each one of them, put a Noise map in the bump slot. Use the same noise parameters, but change slightly the 'Phase' parameters.
- In RailClone, turn on Randomness->Offset Material ID->Sequence (0 to 1) for the segment.
In this way, the two bumps will be used alternatively along the panes of glass (see the image). If you are already using a multi-sub material, please see the help to create the material correctly:http://www.itoosoft.com/railclone/reference/refrandomness.php
I got the idea from here:http://area.autodesk.com/forum/autodesk-3ds-max/lighting---rendering/reflection-effects-on-mr-glass
At this moment i cannot create a Max 2009 scene for you, but i can do it later if you need it.