OTOY Forums

Anyone know how to assign different Octane materials to the inside and outside of an object? Or the 'back' and 'front' of a polygon? With a standard C4D Material you can just assign one texture to the back and one to the front in the texture tag.

Any help greatly appreciated

hi,
sure, you can use a polygon side node in the amount node of a mix texture/material node
ciao beppe

Aha! Thanks Beppe! I'll try and work out what you have just described

Sorry Beppe,

Can't work out how to do what you said- Though I'm not using the node editor in C4D just the basic Texture manager boxes... Can I do it with those? If so would you mind explaining how?

Many thanks

Pokeit

Hi,
yes, of course, it is possible to do the same also in the attribute editor, here is an example ciao beppe

Thanks so much Beppe! I will check it out!

Cheers!

Aha! So I made it work by following your system- There's just one thing is it possible to use an emissive material as the inner one? I've tried with your method but the effect just disappears

Thanks again Beppe!

The emissive works just on the front side and not on the back. I wish there was a way to make it emit on the back side also.

Hi,
yes, this is the only limitation, the emission always happens only in the direction of the polygons' normal.
A workaround is to assign a null material to the back side, duplicate the mesh, invert the normals, slightly apply a normal move and assign a different material to the new backside.
ciao beppe