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Using normal or bump maps in cycles produces flat washed-out shading
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Windows 10 x64
Graphics card: GeForce GTX 1660 Dual OC

Blender Version
Broken: 2.81, 2.82, 2.83 from 2020-03-06 22:46
Worked: 2.80

Short description of error
Using normal or bump maps in cycles produces flat washed-out results comparing to EEVEE.
The bug also appears in the latest 2.83 build, it affects both Diffuse and Principled Shader but not Glossy.
Normal Map and Bump nodes seem to produce identical results with the 2.80 version, so the problem lies with the Shader node itself.

Exact steps for others to reproduce the error

  1. Open file
  2. Switch to Rendered viewport shading

Event Timeline

Andrew Grabko (ttrevan) renamed this task from Cycles to Using normal or bump maps in cycles produces flat washed-out.Sat, Mar 7, 5:20 AM
Andrew Grabko (ttrevan) renamed this task from Using normal or bump maps in cycles produces flat washed-out to Using normal or bump maps in cycles produces flat washed-out shading.
Andrew Grabko (ttrevan) created this task.

If the same bump map used as an input to Displacement Node in Bump Only mode, shading works correctly

Richard Antalik (ISS) changed the task status from Needs Triage to Confirmed.Mon, Mar 9, 12:18 PM
Brecht Van Lommel (brecht) changed the subtype of this task from "Report" to "Bug".Fri, Mar 20, 2:36 PM