Boolean modifier removes edge crease settings #32203

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Joel Wiseheart · 2012-07-27T22:39:27+02:00

Joel Wiseheart commented

2012-07-27 22:39:27 +02:00

%%%OS: I have tried this on Windows 7 SP1 and Windows XP SP3
3D Card Type: 256MB ATI Radeon X600
Blender Version: 2.63a .ZIP file

I have an object that I'm modifying, and had set a number of the crease settings on the edges for use with a subsurface modifier. I needed to "punch a hole" in the object, so I tried to use the Boolean modifier. Clicking Apply did apply the modifier, but it removed ALL crease settings on the object, even though none of them were near the punched hole.

I can't really include a .blend file, since the history goes away when I save it. I do have the steps to simulate this behavior with a couple cube primitives:

Start Blender, make sure the default cube is selected.
Press TAB to enter Edit Mode.
Add a subsurface modifier, crank the View: setting to about 5. Our cube is now a sphere.
Press A if needed to make sure all edges are selected.
Press N to bring up the Navigate Panel, and set the Mean Crease setting to about 0.5. Now we have a cube with rounded edges. Note the pink color of the creased edges.
Switch back to Object Mode, and press A to deselect everything.
Press SHIFT+A and add another cube. Drag it out along the X axis so it's not obscured by the default cube. Name the object "punch".
Resize the cube: First, hit S and shrink it down. Then, type SX to make it bigger along the X axis. It should be a long, skinny box.
Drag the Punch cube back along the X axis so it goes through the middle of the default cube.
Select the default cube, and add a Boolean modifier. Set the Operation: setting to 'Difference', and the Object: setting to 'Punch'. Click 'Apply'.
Select the Punch cube and delete it.
Select the default cube again, and press TAB to re-enter Edit Mode. The default cube has the modifier applied, but ALL previous crease settings, including the pink edges, from the outer edges are removed.

Forgive me if this is expected behavior (I didn't expect it), but I am a Blender 3D noob. Hope this helps!%%%

%%%OS: I have tried this on Windows 7 SP1 and Windows XP SP3 3D Card Type: 256MB ATI Radeon X600 Blender Version: 2.63a .ZIP file I have an object that I'm modifying, and had set a number of the crease settings on the edges for use with a subsurface modifier. I needed to "punch a hole" in the object, so I tried to use the Boolean modifier. Clicking Apply did apply the modifier, but it removed ALL crease settings on the object, even though none of them were near the punched hole. I can't really include a .blend file, since the history goes away when I save it. I do have the steps to simulate this behavior with a couple cube primitives: 1. Start Blender, make sure the default cube is selected. 2. Press TAB to enter Edit Mode. 3. Add a subsurface modifier, crank the View: setting to about 5. Our cube is now a sphere. 4. Press A if needed to make sure all edges are selected. 5. Press N to bring up the Navigate Panel, and set the Mean Crease setting to about 0.5. Now we have a cube with rounded edges. Note the pink color of the creased edges. 6. Switch back to Object Mode, and press A to deselect everything. 7. Press SHIFT+A and add another cube. Drag it out along the X axis so it's not obscured by the default cube. Name the object "punch". 8. Resize the cube: First, hit S and shrink it down. Then, type SX to make it bigger along the X axis. It should be a long, skinny box. 9. Drag the Punch cube back along the X axis so it goes through the middle of the default cube. 10. Select the default cube, and add a Boolean modifier. Set the Operation: setting to 'Difference', and the Object: setting to 'Punch'. Click 'Apply'. 11. Select the Punch cube and delete it. 12. Select the default cube again, and press TAB to re-enter Edit Mode. The default cube has the modifier applied, but ALL previous crease settings, including the pink edges, from the outer edges are removed. Forgive me if this is expected behavior (I didn't expect it), but I am a Blender 3D noob. Hope this helps!%%%

Joel Wiseheart commented

2012-07-27 22:39:27 +02:00

Changed status to: 'Open'

Sergey Sharybin commented

2012-07-28 14:03:32 +02:00

%%%This is known limitation of boolean modifier -- currently it works with faces and edges are being re-calcuated after boolean operation was performed. It could be improved, but that's not considered a bug.
Thanks for the report, but closing it now.%%%

%%%This is known limitation of boolean modifier -- currently it works with faces and edges are being re-calcuated after boolean operation was performed. It could be improved, but that's not considered a bug. Thanks for the report, but closing it now.%%%

Sergey Sharybin commented

2012-07-28 14:03:32 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2012-07-28 14:03:32 +02:00

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Reference: blender/blender#32203

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Boolean modifier removes edge crease settings #32203