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Activating contact shadow for big objects cause visual artifacts
Open, Waiting for Developer to ReproducePublic

Description

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: rB06312c6d2db8
Worked: (optional)

Short description of error
When activating contact shadow for a sun lamp for a huge scene scale it cause some artifact to be shown on top of the object

Exact steps for others to reproduce the error
Create a plane an scale it to 500 units
Create a sun lamp and activate the contact shadows
Increasing the end value of the sun lamp to 10000
When zooming on the plane a saw texture will be shown on top of the plan


Details

Type
Bug

Event Timeline

Brecht Van Lommel (brecht) triaged this task as Waiting for Developer to Reproduce priority.

Shadowing artifacts are not always a bug, in general you may need to tweak parameters to avoid them and even then things may not work well at very small or large scales.

@Clément Foucault (fclem), is this specific case a bug?