Description

Masked materials used in conjunction with MSAA and Forward Rendering results in a banded gradient which seem to correlate directly with the MSAA count variable.

This is connected to the Forward Renderer as the same settings within the Deferred Renderer do not output the same banded gradient results and works as intended.

Regression?
Yes, this does not occur in previous versions of the engine.

4.14.3-3249277 - Working
4.15.0-3299760 - Not working
Dev-Main-3315740 - Not working

Steps to Reproduce

1. Open attached project.
2. Bring up the console command (~) and type r.MSAACount 2

Outcome A banded gradient appears in the final material output.

Expected No gradient and a cleanly clipped masked material.

Have Comments or More Details?

Head over to the existing Questions & Answers thread and let us know what's up.

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By Design
ComponentUE - Graphics Features
Affects Versions4.15
Target Fix4.16
CreatedFeb 23, 2017
ResolvedMar 17, 2017
UpdatedJan 13, 2021
View Jira Issue