principled BSDF Reflected Roughness bug. #52580
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Reference: blender/blender#52580
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System Information
Windows 10 Home Insider Preview Build 16275.rs3_release.170822-1423 and Nvidia 8400GS
Blender Version
Broken: 2.79-rc2-windows64
7b397cdWorked: (optional)
Short description of error
I found principled BSDF bug. Reflected Roughness bug.
Exact steps for others to reproduce the error
add Floor ( Plane , scale x8 , g > z > -1)
add Cube ( anywere on a Floor )
add UV Sphere ( set smooth , anywere on a Floor )
(or Any object as you like...)
add same material to all objects (not indivisual,same material)
set Principled BSDF
set metal 1
set roughness 0
Then , all reflected object are No reflection!! Why?
Changed status to: 'Open'
Added subscriber: @uwright
Added subscriber: @Harvester
Here on Win10 Pro 64bit (build 1511) portable, and Blender 2.79RC2, the reflections work correctly with zero roughness as you can see below:
Added subscriber: @dfelinto
Please attach a simple sample .blend as suggested in the bug report instructions.
Perhaps the "issue" raised by the user is due to the Glossy Indirect pass which if the Filter Glossy parameter is set higher that 1 will blur the glossy reflections, giving the impression that they are missing. Here are some examples and the .blend file created for this tests.
Filter Glossy = 0
Filter Glossy = 1
Filter Glossy = 1.1
Filter Glossy = 1.5
T52580_skytexture.blend
Hope it helps.
Oh...
My Filter Glossy value is ... 5 !!
When I set the value to 1 or less, roughness disappeared.
Thank you for commentary.
Added subscriber: @brecht
Changed status from 'Open' to: 'Archived'
Ok, I'll close as not a bug then. We can try to make filter glossy smarter in the future, but if it's set to such high values then excessive blurring is more or less expected.