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I am trying to assign multiple materials to an object (to different faces). I understand that I have to have multiple materials, and multiple material slots with these materials assigned.

However, I am having trouble creating a material slot in the first place. I select my object, then, still in object mode, I go to Materials tab, then press + on the right of the slot list (A). Nothing happens (i.e. no slot appears in the list) (B).

Blender Material Slots

I thought it might be that I have no material yet, so I pressed the "+ NEW" button below the slot list (C), created a new material, and with it still showing, clicked the + (A) on the right of the slot list again. Nothing happens (i.e. no slot appears in the list).

What am I missing here?

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  • $\begingroup$ Are you using the Cycles rendering engine or the Blender internal? $\endgroup$ – agiro Jun 25 '17 at 8:38
  • $\begingroup$ By the way, if on Cycles, you add a new mat slot, create a new mat (if you wish) then go to edit mode in the mesh, go to face mode and select the faces you want the material to be assigned to, then you will see Assign, Select, Deselect. Click assign and you should be fine. $\endgroup$ – agiro Jun 25 '17 at 8:44
  • $\begingroup$ It doesn't seem to matter which rendering engine I use. As for the Assign/Select/Deselect: Yes, I see them; but as I don't have a material slot, clicking them doesn't do anything. $\endgroup$ – Phil Jun 25 '17 at 9:35
  • $\begingroup$ Is this object linked in from another blend? $\endgroup$ – David Jun 25 '17 at 18:09
  • $\begingroup$ @David no; it was however imported from a .stl file. $\endgroup$ – Phil Jun 26 '17 at 11:18
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Phil, I add below a capture of how it should be behaving (both on blender render or cycles render): if it does not work like this, something went wrong, either the blender install itself or something else...

enter image description here

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  • $\begingroup$ That is how I thought it should look like ;-) I now exported my model as an FBX, reimported it into a new .blend file, and there the material slot does indeed appear. Something seems to have gone very wrong in my first .blend file. Rather weird. Thanks, this helped! $\endgroup$ – Phil Jun 25 '17 at 9:56
  • $\begingroup$ When making a gif that includes button presses it would be a good idea to include the mouse pointer. $\endgroup$ – David Jun 26 '17 at 12:29
  • $\begingroup$ @David I agree, I'm using LICEcap on linux (through wine) and I can't see the option... is it possible, how? $\endgroup$ – m.ardito Jun 26 '17 at 14:26
  • $\begingroup$ @David I just found key-mon (github.com/critiqjo/key-mon), it seems quite useful for tutorial-like screen recording... I'll try to update the gif video, tomorrow... thanks for pointing this out! $\endgroup$ – m.ardito Jun 26 '17 at 17:16
  • $\begingroup$ @m.ardito odd, I use licecap (on windows) and it captures the mouse pointer. $\endgroup$ – David Jun 26 '17 at 22:40

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