displacement, mixer and multiple material

[pixelinfected]

I tried to found solution around forum, but i not found enought to answer to my question.
I used octane few times, also if i start with beta, and never used the displacement.
to be more clear i preferred to build an animated png to explain better my problem.

i want to build a material where i mix different material each one with its displacement, but ...
if i put disp on single material = OK
if i put disp on last material mixer = OK
all other test give me No displacement.

any idea?

[juanjgon]

I think that this is a limitation in Octane. You can't mix displacement maps due to huge performance hint you could get. Displacement only works if linked to the latest material/material mixer node in the shader tree.

-Juanjo

[pixelinfected]

Thanks a lot juanjgon
another question, linked to that...
ok i cannot mix displacement, but if i want to limit displacement to a part of obj with a picture?
how can i do an alpha for a picture with another picture to limit a displacement in some part of it? naturally i want to use a gradient or a picture to drive it.

[juanjgon]

I'm afraid you can't mask the displacement inside the shader tree. The texture mixer or multiplier nodes are not supported in displacement. You are going to need to paint a texture ready to be used over the whole object UV space, with black zones where you don't need displacement.

-Juanjo

[pixelinfected]

ok, i will find a workaround.