Contact Shadows causes wrong shading in Reflection Plane #89777
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Reference: blender/blender#89777
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System Information
Intel i9-10850K, 32 Gb RAM, NVidia GeForce GTX 1070 8GB
Windows 10 x64
Blender Version
Broken: 2.92
Worked: 2.91
Caused by either
ba75ea8012
or6842c549bb
Short description of error
New Reflection Plane algorithm produces inverted colors, overly darkened areas, blocky artifacts and some other lighting anomalies with Contact Shadows enabled which didn't happen before.
Exact steps for others to reproduce the error
Open provided file, enable Rendered mode and observe the result in the mirror, disable Contact Shadows on the light and darkened areas on the floor, blocky glitches on the opposite wall and strange lighting on Suzanne will disappear. If you open the same file in 2.91 that bug won't happen.
ContactShadowsReflectionPlaneBug.blend
Added subscriber: @SpectreFirst
Just in case, in 2.93.4 RC objects in Reflection Plane have weird outlines when Screen Space Reflections is also enabled and Contact Shadows produce strange dark circle which reacts to Distance and Thickness parameters of the Contact Shadow itself.
Added subscriber: @lichtwerk
Changed status from 'Needs Triage' to: 'Confirmed'
Can confirm, will bisect.
Added subscriber: @fclem
Will dare setting this to High prio.
@fclem: this is not an expected side-effect of those commits, right?
This issue was referenced by
f9f6d8de58
This issue was referenced by
d39cd851c0
Changed status from 'Confirmed' to: 'Resolved'
I have tested Blender 3.0 alpha (2.93 hasn't been updated at the moment) and Contact Shadows do not produce the weird black circle anymore but fuzzy outline around all objects is still there, it seems to appear when Screen Space Reflections and Reflection Plane are used together and it reacts to Half Res Trace settings and becomes a little bit thinner when you disable it. I have double-checked in 2.91 and that outline does appear in it as well but it is a lot thinner so should this be reported as a separate ticket?
Thx checking.
Yes, please report this separately [afraid this will slip through otherwise]
This is known side effect of the changes in screen space reflection we made in 2.93. This is a known limitation.
It looks like this problem was not resolved for 2.93, I've tested on both 2.93.5 and daily 2.93.6 and both still have this!
Changed status from 'Resolved' to: 'Needs Developer To Reproduce'
@fclem: should
d39cd851c0
be part of {#88449}?Added subscriber: @Jeroen-Bakker
@lichtwerk, yes can be added
Changed status from 'Needs Developer To Reproduce' to: 'Archived'
Ok, added to be included in the next LTS release.
Will close the report then.
Changed status from 'Archived' to: 'Resolved'