Multi/Sub-Object Material + Refraction

[Tim Saunders]

I was struggling to get my glass material looking right for this lamp which is the main body portion of the lamp. I typically use multi/sub-object materials when I have multiple materials on one "object" such as a lamp or a piece of furniture. Finally, I copied the material from the "m.s.o." material into it's own material, and applied it to the glass portions of the lamp and it rendered fine. The attached image shows the left one with the seperate glass material, and the one on the right with the m.s.o. material with the propper material id used on the material modifier. See the material that is supposed to be glass, is black, not transparent. I got that as soon as I added any refraction while the material was within the m.s.o. material. Is anyone aware of any bugs regarding the issue?

[Ricardo Eloy]

I remember there was a problem regarding glass and M.S.O. materials. Don't remember exactly why, but they kindda don't work together. Stick to the "lots of materials" approach instead, Tim.

[mooney102]

Here is the link

 

http://www.cgarchitect.com/vb/20653-glass-wont-affect-shadows-correctly-mutli-sub-objects.html?highlight=multi+object+glass

[Tim Saunders]

Rick's theory works sometimes, but I cam becomming more and more reliant on vray proxies llt he time, which require mso mats.

 

Tanks for the thread link Brian. Glad there is a work around while still keeping a mso material.

[Thablanch]

There is a bug in 1.5 for refraction in a sub-object material... It is a known issue..

Use the very same mat. in a regular way, ( alone, not sub-object) and it is going to work no problem

[Tim Saunders]

Ya, but if you want vray proxies in your scene, you have to use a mso material. Mooney posted the link with the work around solution. It works great!