Maniphest T39799

Backdrop (compositor) ignores alpha
Closed, Resolved
Actions

Assigned To
Lukas Tönne (lukastoenne)
Authored By
Kévin Dietrich (kevindietrich)
Apr 20 2014, 1:05 AM
Tags
  • BF Blender
  • Compositing
Subscribers
Bastien Montagne (mont29)
Kévin Dietrich (kevindietrich)
Lukas Tönne (lukastoenne)
paul geraskin (mifth)
Thomas Beck (plasmasolutions)
Willi (willi)

Description

System Information
Linux Mint 15, GTX 650

Blender Version
Broken: 2.70.3 36defb7

Short description of error
The backdrop in the compositor (and Image Editor set to Viewer Node) shows black pixels instead of transparent ones when the image has alpha information.

Exact steps for others to reproduce the error
(BI is "harder" to setup for this)

  1. With Cycles, Film set to "Transparent", do a render of the default cube.
  2. Switch to the node editor, activate "Use Node" & "Backdrop"
  3. ctrl-click on the render to get a viewer node -> transparency is ignored, while present in the node(s) preview(s)

Screenshot

Revisions and Commits

rB Blender
rB005dabbd9ad5 Fix T39799: Backdrop (compositor) ignores alpha.
rBAC Blender Add-ons Contrib
rBAC005dabbd9ad5 Fix T39799: Backdrop (compositor) ignores alpha.

Related Objects

Duplicates Merged Here
T39876: Alpha background is broken.

Event Timeline

Kévin Dietrich (kevindietrich) created this task.Apr 20 2014, 1:05 AM
Kévin Dietrich (kevindietrich) raised the priority of this task from to 90.
Kévin Dietrich (kevindietrich) updated the task description.
Kévin Dietrich (kevindietrich) added projects: BF Blender, Compositing.
Kévin Dietrich (kevindietrich) edited a custom field.
Kévin Dietrich (kevindietrich) added a subscriber: Kévin Dietrich (kevindietrich).
Kévin Dietrich (kevindietrich) added a comment.Apr 20 2014, 1:15 AM

I found this issue while trying to get a fix for T39784 : the task author reported some issues with the blur node, in his screenshot (apparently 2.70a) one can see that the transparency works fine, but now it seems it doesn't, so it's gonna be difficult to fix it.

My guess is that it has something to do with 09874df, but so far I couldn't get a possible fix :( .

Bastien Montagne (mont29) lowered the priority of this task from 90 to 50.Apr 20 2014, 9:26 PM
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).
Bastien Montagne (mont29) added subscribers: paul geraskin (mifth), Willi (willi).Apr 24 2014, 2:09 PM

◀ Merged tasks: T39876.

Thomas Beck (plasmasolutions) added a subscriber: Thomas Beck (plasmasolutions).Apr 24 2014, 10:23 PM
Lukas Tönne (lukastoenne) claimed this task.Apr 25 2014, 9:02 AM
Lukas Tönne (lukastoenne) added a comment.Apr 25 2014, 9:08 AM

Can confirm this was caused by rB09874df, somehow ...

Lukas Tönne (lukastoenne) edited this Maniphest Task.Apr 25 2014, 12:18 PM
Lukas Tönne (lukastoenne) changed the task status from Unknown Status to Resolved.Apr 25 2014, 12:18 PM

Closed by commit rB005dabbd9ad5.

Lukas Tönne (lukastoenne) edited this Maniphest Task.May 12 2014, 4:49 PM