Description

Reflections are rendering incorrectly in Rendering Preview Level SM4 in 4.18, but were working as expected in 4.17. This is a regression.

When I reproduce the issue, I get results similar to issue from JIRA [Link Removed]. See attached Screenshots.

Steps to Reproduce
  1. Open attached Project in 4.17
  2. Change to SM4 (Settings > Preview Rendering Level > Shader Model 4)
  3. Notice the quality of reflections looks nearly identical to SM5
  4. Open same project in 4.18
  5. Change to SM4 (Settings > Preview Rendering Level > Shader Model 4)
  6. Notice the quality of reflections compared to SM5 is very poor.
    Result: Reflections appear only on outer edges of spheres. There are large grey areas with no reflections. Screen shots attached.
    Expected: Reflections in SM4 look same in 4.18 as in 4.17.

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Won't Fix
ComponentUE - Graphics Features
Affects Versions4.18.1
CreatedDec 7, 2017
ResolvedDec 12, 2017
UpdatedMay 4, 2018
View Jira Issue