Difference Boolean Modifier does not work in most simple cases with Array Modifier #52329
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Reference: blender/blender#52329
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System Information
Win7-x64
nVidia GeForce - 1060
Blender Version
Broken: 2.79.RC (Hash:
5e9132b
)Short description of error
The Difference Boolean Modifier does not correctly 'cut' the main object when the second object (the one which will cut the main one) is an array of objects.
Exact steps for others to reproduce the error
With an empty scene do:
Expected: "Cube" should appear as a normal grid of square holes.
Actual: "Cube" has some holes filled up and some holes filled only by half by some faces left by. The result varies upon on relative placement between the array and the plaque and upon of other factors (distance between the pillars, number of them etc.). Rotate, zoom, pan and look in each hole to see. I attached also a JPG here to show the phenomenon.
Just execute the steps 7 and 8 on the attached blend file and examine it.
Array-Difference-Bug.blend
Based on a (as simple as possible) attached .blend file with minimum amount of steps
Array-Difference-Bug_ubertest.blend edited: A more comprehensive example for reference (animated at multiple scales) ~ ideasman42
Changed status to: 'Open'
Added subscriber: @m.Th
Added subscribers: @ideasman42, @Sergey
@ideasman42, this is one of the cases when BMesh boolean is failing. Mind having a look? :)
This issue was referenced by
a4bcdf5fb1
Changed status from 'Open' to: 'Resolved'
Changed status from 'Resolved' to: 'Open'
Thanks a lot! Somethingis indeed improved. However the bug is still present in 2.79 -
66c1b23
(Date: 2017-08-14 23:22)The original attached blend file works ok now.
...but the newly attached one does not. (I moved a little the plaque). Take a closer look at "holes". Some of them are half-filed with residue faces.
Array-Difference-Bug-2.blend
Changed status from 'Open' to: 'Resolved'
@m.Th I didn't see you re-opened this report - and now its too late, 2.79 is already released.
Can you open a new report since the original one is fixed (including a test at multiple scales and animated rotations).
@m.Th - this is in fact not an error in booleans, its an error in face-filling.
Good find, we didn't have reports in this part of the code in years :)