acad2004/viz/radiosity

I'm using acad2004 adt with viz renderer.

I quite often model buildings in levels, i.e. with layers:

l1_walls, l1_windows, l2_walls, l2_windows.

This allows me to create the whole thing bit by bit and view various levels
in isolation.

However, this causes problems with my radiosity rendering. Since l1_walls
and l2_walls are two objects, they are interfering with each other during
radiosity calculation when they really shouldn't do.

E.g. l1_walls and l2_walls are coplanar, but they end up slightly different
shades because of radiosity. It all looks fine without radiosity (except it
doesn't look as good!!!).

I also find that radiosity doesn't give satisfactory results on booleaned
(if there is such a word) solids. It's much easier to fix problems like
this in 3dsmax, but not in AutoCAD.


Does anyone have a solution to this?

Henry
Department of Architecture and Civil Engineering
staff.bath.ac.uk/abshhkc
3thirteen.co.uk