In the Material editor for when working with a Post Process Material, the material does not appear in the preview window.

This issue does not occur in 4.15.2 Binary Builds

Steps to Reproduce
  1. Create a new project (No template or starter content needed)
  2. create a new material > name it TEST_MAT > Open TEST_MAT
  3. add a constant 1 to the material graph and connect it to the Emissive Color option (expected Result)
  4. Change the Material Domain to Post Process
  5. Click the Apply button
    Result: The Material does not appear in the Material Preview window
    Expected Result: The Material appears in the Material Preview window

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ComponentUE - Graphics Features
Affects Versions4.16
Target Fix4.16
Fix Commit3450102
Release Commit3450190
CreatedMay 19, 2017
ResolvedMay 20, 2017
UpdatedApr 27, 2018
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