0
$\begingroup$

This is the coffee cup that I made and it is rendered with the cycles engine on top of a white plane: enter image description here

This is the coffee cup that I made and it is rendered with the cycles engine on top of a white plane acting as a shadow catcher. AKA for the plane I selected "Object Properties" > "Visibility" > then checked the box "Shadow Catcher". I also checked the box labeled "transparent" under "film" in the "Render Properties" tab: enter image description here

I am trying to composite this cup into a video (using davinci resolve) so I need the background to be transparent but the cup just ends up looking white instead of clear. Is there a way to make the cup have a shadow while still being mostly transparent?

Btw, I'm using Blender 2.83.5

$\endgroup$
  • $\begingroup$ Did you render/save the alpha channel? $\endgroup$ – Ron Jensen Aug 31 '20 at 3:23
  • $\begingroup$ How would I do that? Is there a way to export/save the alpha channel separately? The only place in this file that I see "alpha" listed is here in my composite node. imgur.com/dQBKG76 $\endgroup$ – ChristianOConnor Aug 31 '20 at 4:40
  • $\begingroup$ What format are you using to export the image? Try EXR. $\endgroup$ – no-can-do Aug 31 '20 at 5:29
1
$\begingroup$

GUI Setting Under "Film" also check "Transparent Glass" You must use a Glass Shader on your glass, adding a Gloss Shader mixing a with Fresnel works, too.

Full Render

It is possible to save the alpha channel separately. The alpha channel

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.