Description

Using Shader Model 5 and tessellation on Linux gives strange results that are not present when used on Windows

ex:
1) When using Shader Model 5 on Linux, turning on Translucent blend mode and Tessellation causes the material preview to flicker.
2) Lit material with tessellation does not cast shadows from dynamic world light (sun)

Steps to Reproduce
  1. Open UE4 editor with SM 5 enabled (./UE4Editor -opengl4 in terminal)
  2. Create a new Material in the content browser
  3. Hold 3 and left click to create a vector3 node
  4. Wire Verctor3 node into Base color
  5. with material inputs node selected, edit the following properties of the detail panel
    • Set Blend Mode to Translucent
    • Set Tessellation to Flat Tessellation

Result:
Material preview begins to flicker wildly.

Have Comments or More Details?

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

1
Login to Vote

Fixed
ComponentUE - Platform - Linux
Affects Versions4.12.4
Target Fix4.15
Fix Commit3226542
Main Commit3233813
CreatedJul 6, 2016
ResolvedDec 8, 2016
UpdatedApr 27, 2018
View Jira Issue