OTOY Forums

It's the first time I try to render a tree in Octane.
In the host modeler, the setting is good (alpha, opacity), but once in octane I can see the squarres surrounding the leaf that still appear like squarre glass, perhaps with 90% trasparency
Is there a way to adjust opacity in Octane so that transparency would be total ?

Each time I encountered this kind of problem in Blender, it was due to specularity.

Maybe it is the same thing in Octane : Try to put the specularity cursor to zero, and also reduce the thin film parameters (IOR =1, thickness=0=).

Does it work ?

Thank you,

I have to go to work, I will try tonight.

by default texture power is 0.9 no ? make sure it's set at 1

It doesn't work neither.

David wrote:It doesn't work neither.

it has to work make sure the power of opacity texture is set to 1 and not 0.9

can you post your texture here so we can try ?

I just tried out some demo xfrog trees, and had a similar prob, it's up to the power slider of the opacity and the gamma setting of the floatimage (in this case) and also I inverted the setting, so the opacity image has to be black&white no greys. So if you have some of those alpha/opacity/transparency maps which have a green color around the leaf it's all grey when you load it into octane therefore it will not be 100% transparent and a box will be shown, so redo the opacity map (make it black/white) if the power slider or gamma slider doesn't do anything, that's what I encountered with some models..
I think upping the gamma and power slider to the max setting and inverting the map that's about all you can do inside octane, try those, if no work, retouch the texture..

acc24ex wrote:I just tried out some demo xfrog trees, and had a similar prob, it's up to the power slider of the opacity and the gamma setting of the floatimage (in this case) and also I inverted the setting, so the opacity image has to be black&white no greys. So if you have some of those alpha/opacity/transparency maps which have a green color around the leaf it's all grey when you load it into octane therefore it will not be 100% transparent and a box will be shown, so redo the opacity map (make it black/white) if the power slider or gamma slider doesn't do anything, that's what I encountered with some models..
I think upping the gamma and power slider to the max setting and inverting the map that's about all you can do inside octane, try those, if no work, retouch the texture..

I think it's this too. Try using black/white only alpha map and test inverting it too.
I had similiar problem too, not exatly sure what made it work later, but I managed to fix it somehow easily.

Thanks a lot acc24ex, I have tried and it works !

I also use some free xfrog trees. In fact one must create a separate black and white alpha map for opacity material.

Thank you again.