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I am getting this error in 3ds Max 2018. When I changed renderer to Arnold and I open material editor, the below error pops-up.

Render Message: Arnold

SYSTEM: Material Editor renderer is changed to Scanline Renderer. Previous messages are cleared.
SYSTEM: Material Editor renderer is changed to Arnold. Previous messages are cleared.
This material is not supported: 01 – Default (Standard). An approximation will be used.
This material is not supported: 02 – Default (Standard). An approximation will be used.
This material is not supported: 03 – Default (Standard). An approximation will be used.
This material is not supported: 04 – Default (Standard). An approximation will be used.
This material is not supported: 05 – Default (Standard). An approximation will be used.
This material is not supported: 06 – Default (Standard). An approximation will be used.
This material is not supported: 07 – Default (Standard). An approximation will be used.
This material is not supported: 08 – Default (Standard). An approximation will be used.
This material is not supported: 09 – Default (Standard). An approximation will be used.
This material is not supported: 10 – Default (Standard). An approximation will be used.
This material is not supported: 11 – Default (Standard). An approximation will be used.
This material is not supported: 12 – Default (Standard). An approximation will be used.
This material is not supported: 13 – Default (Standard). An approximation will be used.
This material is not supported: 14 – Default (Standard). An approximation will be used.
This material is not supported: 15 – Default (Standard). An approximation will be used.
This material is not supported: 16 – Default (Standard). An approximation will be used.
This material is not supported: 17 – Default (Standard). An approximation will be used.
This material is not supported: 18 – Default (Standard). An approximation will be used.
This material is not supported: 19 – Default (Standard). An approximation will be used.
This material is not supported: 20 – Default (Standard). An approximation will be used.
This material is not supported: 21 – Default (Standard). An approximation will be used.
This material is not supported: 22 – Default (Standard). An approximation will be used.
This material is not supported: 23 – Default (Standard). An approximation will be used.
This material is not supported: 24 – Default (Standard). An approximation will be used.

How to solve this?

1 Answer

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It’s easy to solve this error. Actually Arnold renderer does not support the Mental-Ray materials.
So You’ll have to replace all your standard materials with Arnold materials in order to get rid of those errors.

Here are the steps:

  1. Open render setup window and select Arnold renderer. (Key-board shortcut to open render setup F10)
  2. Open Material Editor (Key Board shortcut = M)
  3. In Material Editor, Click on Modes and choose Compact Material Editor.
  4. Select any Material slot, then click on standard, it will open Material/Map Browser window.
  5. Now find Arnold and click the little + icon of the Arnold Material. (it will show you a drop down material list)
  6. Now click on the little + icon of the Surface Material and choose Standard Surface material.
  7. Click on OK.

Now repeat the same steps for all the materials in material editor, and replace all the materials with Standard Surface.

That’s it.

Enjoy the Arnold rendering.
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