Render glass shader solo whit alpha ?

[nezgro79]

Hellon for my compositing scène i need to render juste a few glass tube solo , but if a render juste the tube whitout my background but whit my light , my tube are not trasparent . How can i fix it ?

[nezgro79]

whit file

[Anonymous]

Here is a tutorial for you:
https://support.solidangle.com/display/A5AFMUG/Rendering+Glass+Surfaces+with+Arnold

[nezgro79]

ok but my problem is if i activate background i have my transparency

[nezgro79]

like this

[Anonymous]

Disabling the background if you are using Arnold Sky just put camera contribution to 0
if you are using a sphere with texture as a background it's normal that you get a black when you deactivate it. because you have nothing in your environment to reflect
here is a test with Arnold Sky Camera contribution=0

and here with camera contribution=1

[nezgro79]

how ok but i have a lighting setup whitout sky and if i put a sky my glass are not the same lighting of the rest of my scène

[Anonymous]

add arnold tag to your background and unchek primary visibility

[Anonymous]

with tag visibility ON

with tag visibility OFF

[nezgro79]

Ok its work but is not transparant to make my compositing working

[Anonymous]

To get transparency you must add arnold tag with opaque unchecked
You have 3 bottle facing the camera, aligned one behind the other two, each bottle must have at least 4 rays, so 4*3 = 12
So set transmission value to 12 in Render Setting/Ray Depth

[nezgro79]

same again 😞

[lee_griggs]

Can you show your shader settings. Does it have Transmission?

[nezgro79]

I try this !

[lee_griggs]

What happens when you increase Transmission Depth?

[nezgro79]

nothing 😞

[nezgro79]

in the after effect project my glass is not transparaent and dont show my rhino

[lee_griggs]

Can you post a simplified scene?

[nezgro79]

ok try to export the glass in after effect and put another layer behind it 😉

Thank you my friend

[url=https://www69.zippyshare.com/v/Z1q93KYn/file.html]forum.zip[/url]

[lee_griggs]

That link doesn't work. Can you post it somewhere more reliable, please?