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light shading looks different in eevee
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Description

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce 820M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 389.12
Processor: Intel(R) Core(TM) i3-4005U CPU @ 1.70GHz, Intel® HD Graphics 4400 (Integrated)

Blender Version
Broken: version: 2.80 (sub 71), branch: blender2.7, commit date: 2019-05-20 22:03, hash: rBe78770039397
Worked: (optional)

Short description of error
Light shading looks different in eevee

Exact steps for others to reproduce the error

  1. Deleted the default light in the default startup scene.
  2. Added Area light and increased the light power from 10W to 1000W
  3. slightly moved the light on top of the cube.

I see different light shading like the zigzag line. please check the screenshot and the attached blend file.

Screenshot :

Blend File:

Details

Type
Bug

Event Timeline

Brecht Van Lommel (brecht) lowered the priority of this task from Needs Triage by Developer to Waiting for Developer to Reproduce.

Not sure if this is a bug, or just typical shadow mapping artifacts that you have to tweak with parameters or workarounds. Will leave it to @Clément Foucault (fclem) to decide.

Yes this is shadow mapping artifacts. See https://docs.blender.org/manual/en/dev/render/eevee/shadows.html for more explanation.