Very often when i have a lot of materials in the scene and switching to materials tab, blender starts to rendering that materials to make a preview icons. This procedure taking a lot of memory and is cause of crashes when you have many materials(specially complex materials) and low RAM.

  • $\begingroup$ are you talking of the "preview" panel in the "material" data tab in "properties" editor? if so, did you try to collapse the "preview" panel, so that the image is not visible? (not sure that helps...) $\endgroup$ – m.ardito Jun 30 '17 at 13:05
  • $\begingroup$ no, i am talking about that small icons that you see on the left side of material name. $\endgroup$ – Dmitry Jun 30 '17 at 13:23

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