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Cycles portals: Luminance artifacts
Closed, ResolvedPublic


System Information
Win10 64bit, 2x GTX970, i7 5820K

Blender Version
Broken: 2.76b
Worked: ---

Short description of error
The portal planes divide the scene into smaller parts and some of the parts are rendered darker than the other.

Exact steps for others to reproduce the error

Open the blend file and hit F12 (Render)
The render has visible "lines" going from the intersection of portals - even over the monkey.
Disable the second layer with portals and render it again - now the artifact are gone.

Event Timeline

Marek Moravec (marek) set Type to Bug.
Marek Moravec (marek) created this task.
Marek Moravec (marek) raised the priority of this task from to Needs Triage by Developer.
Lukas Stockner (lukasstockner97) triaged this task as Normal priority.Feb 16 2016, 11:35 PM

Can confirm the bug, most likely something in the PDF evaluation goes wrong when one of the portals is ignored due to the facing test.
I'll have a look.