Label material above a mix material

[nicolectro]

Hi everybody, i have an issue when i try to put a material containing a psd file (in an image texture node in both diffuse et opacity chanel) above a mix material (let's say a carpaint mix material from the LiveDb database). Alpha doesn't seem to work in this case. When i put a single material instead of a mix material, i have no trouble. You should say to use another mix material with the alpha in its amount but as the projection is not the same, i have a break line that appears. Is there something i've missed? is there a simple solution i don't know.
Thxs a lot.
Nico

With a simple label material (diffuse+opacity chanel) above a mix material, it doesn't work

With the same label material above a simple diffuse material, no problem

With a mix material, it works but…

Here you can see the break between the 2 parts

[aoktar]

Can you post scene with texture?

[nicolectro]

Thxs aoktar. Here is a link to a simple scene.

https://dl.dropboxusercontent.com/u/290 ... %2Bmix.zip

[aoktar]

I think your problem is to try to use stacking with mix materials. see

[nicolectro]

So i presume you mean stacking is impossible with mix material. But why? Unless it's very hard to explain, i'd like to understand
Thxs a lot

[aoktar]

So i presume you mean stacking is impossible with mix material. But why? Unless it's very hard to explain, i'd like to understand
Thxs a lot

I don't mean that's impossible. It's not supported until now.
Implementing that in to Octane was quite hard. Because we're not a CPU renderer and we don't have any ways to create/evaluate virtual materials at run-time. So it requires pre-creation of extra special material combinations and need to handle them softly due real-time update system. It's incredible hard to me. Also adding a support for mix-materials was making that much more harder. You can unselect material and call LV/Help/Show nodegraph to see "stacked" materials which are connected to objects in Octane side.

[nicolectro]

I'm not sure i've understood but it's nice to see there is a real support. Thxs again.
Nico

[aoktar]

I'm not sure i've understood but it's nice to see there is a real support. Thxs again.
Nico

Not a problem. I hope that made some sense about difficulity