Description

Contact Shadows have more shadowing errors with lower to mid values than in 4.13 release when the feature was still considered experimental.

Even low Contact Shadow Length value is causing issues.

Attached image for comparison between 4.13.2 and 4.14/4.15 using 0.01, 0.1, and 1.0 values.

Tested with:
Working: 4.13.2 CL-3172292
Broken: 4.14 Binary Release CL-3195953
Broken: 4.15 Dev-Framework CL-3201999

Steps to Reproduce

1. Add any StaticMesh/SkeletalMesh to the scene
2. Adjust the Directional Light's Contact Shadow Length value between 0.01 - 0.5
3. (optional) disable Cast Shadow on the mesh to only see the contact shadows for better visibility.

Results: Artifacting and shadows have more errors than before the feature was annoucned with 4.14

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-38768 in the post.

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Fixed
ComponentUE - Graphics Features
Affects Versions4.144.15
Target Fix4.14.1
Fix Commit3209305
Main Commit3219854
CreatedNov 17, 2016
ResolvedNov 23, 2016
UpdatedApr 27, 2018