When a user changes the value of an inputted node into the material editor, the viewport changes to the world default material as per normal but never recovers to the newly compiled material. Saving the material will restore the new material OR alt tabbing to another program and back to the editor will also restore the material viewport.

User Posted Video: [Link Removed]

Steps to Reproduce


  1. Open any material
  2. Change the value of a Float inputted into the Material

RESULTS: Material Editor Viewport turns to Default World Material

EXPECTED: The Viewport returns to the original Material

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Cannot Reproduce
Affects Versions4.7.2
Target Fix4.13
CreatedMar 9, 2015
ResolvedJul 11, 2016
UpdatedApr 27, 2018