different octane material on inside and outside of an object

[pokeit]

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

[bepeg4d]

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

[pokeit]

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

[pokeit]

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

[bepeg4d]

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

ciao beppe

[pokeit]

Thanks so much Beppe! I will check it out!

Cheers!

[pokeit]

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!

[tomabobu]

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.

[bepeg4d]

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