Antonio Vazquez
b46c21364a
Now, when you add an slot and then draw, the automatic created material will use the empty slot, instead to add a new slot and leave a empty one. This fix only works if you add only an empty slot. We could remove any empty slot in the middle, but as this has no impact in the drawing or file, it does not worth the CPU time to review every time the material list. Anyway, the user can press delete button to remove any empty slot. If we see this is a big problem in the future, we can reopen the bug and add this cleaning function.