Alpha / Transparency problems

[ockelford]

Dear Andrey,

I attach a render, from an X-Frog model of a small shrub. I am using separate alpha and diffuse maps. Each branch / leaf is a plane with a UV mapped diffuse image / opacity map. The vb version is from 2 days ago (20140502).




As you can see, there is a strange black area in the middle, as if the rays give up trying to get through.

Even stranger, the alpha output from V-Ray shows these areas as transparent.



I can't post the scene as its property of X-frog, could you tell me if this is a bug, or if I've just missed some setting? Thanks in advance!!

Regards,


Rob.

[andybot_cg]

the issue is transparency depth in the material. Once you exceed the depth, that's what happens. I've seen it on other plants like that. Two solutions:
1. increase your transparency depth for your material
2. reduce the amount of geometry in your plant.

[ockelford]

Cheers Andy!

I though there may be a simple answer!

Rob.

[ockelford]

Hi Andrey,

Tried to update the exporter as you said in email, and this came up. I have a strong internet connection though!

R

[bdancer]

ockelford, looks like some change in Python 3.4, I'll will rewrite the update function and upload new build asap.

[ockelford]

Thanks Andrey,

Rob

PS - Everytime I open blender if find something else that's been improved / fixed. I just can't wait till the Vray3.0 upgrade for Maya licensees is available. Are nodes in the vb3.0 version yet?

[bdancer]

It's work in progress, but you could try playing with it - download a build with -vb30- in name then chech the wiki: https://github.com/bdancer/vb30/wiki and https://github.com/bdancer/vb30/wiki/Nodes-Layout