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Blender 2.8 completely slows down by applied materials in Evee in rendered view
Open, Needs Triage by DeveloperPublic

Description

Short description of the test

Rendered view Evee;
4 objects: Cone, Plane, Cube, Icosphere (See uploaded blend-file)

  • Cone: Cone material
  • Plane: Plane.material
  • Cube: Cube material
  • Icosphere: Icosphere material

  • Material settings of cone, make viewport, or actually the whole of blender 2.8 very slow
  • When deleting cone, Blender returns to normal
  • When hitting CMD-Z to undo the deletion, it brings back the cone, and Blender slows down again.
  • When applying the Cone material to the Cube, Blender works fine again (!!)
  • When undo-ing that, and applying the Cone material to the Icosphere, Blender stays slow
  • Removing the red cube, makes Blender fast again (undoing that, Blender becomes slow again)
  • Removing Icosphere, Blender stays slow
  • Applying cone.material to Icosphere, Blender stays slow
  • Applying then the cone material to the Cube, then Blender becomes fast again.
  • Redoing previous steps, results stay the same.
  • Saving this project and opening it again: Same result
    • Changing the cone-material itself (giving the subsurface a value of 0.0) speeds blender up again.
    • Giving subsurface a high(er) value blender is still fast
    • Going back to the subsurface value of 0.036364 and Blender is slow again...
  • But the above three steps don't always work that way.
  • Putting the metallic shader blow 1.0 does the trick and makes it fast again.

Blender 2.8 Beta
March 17 2019

System:
MacOS High Sierra
27 inch, mid 2011
3,4 GHz Intel core i7
24 GB 1333 MHz DDR3
GPU: AMD Radeon HD 6970 2048 MB

Details

Type
Bug