How to selectively delete automatically generated supports
 
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How to selectively delete automatically generated supports  

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Kyle Kerby
(@kyle-kerby)
Trusted Member
How to selectively delete automatically generated supports

Okay I'm on a MK4S and have a tool that I need to make for work. Printing it as a single piece wasn't going to work so I cut it where it made sense. 1 half printed beautifully but the second piece has overhangs that definitely require supports. I enabled supports from the build plate only and it did a perfect job. UNFORTUNATELY it also added supports in the alignment holes for joining the 2 cut pieces as well is existing holes that are threaded and printed as such. Is there any way to delete only certain autogenerated supports?

Respondido : 15/05/2026 11:09 pm
Diem
 Diem
(@diem)
Illustrious Member

The support painting tool can also be used to paint blockers.

Cheerio,

Respondido : 15/05/2026 11:37 pm
Neophyl
(@neophyl)
Illustrious Member
RE: How to selectively delete automatically generated supports

You can't paint the cut dowel holes as they arent part of your underlying base mesh.  Also painting in mesh that generates threads is also problematic as you cant see many of the faces. 
Do the inverse.  Don't use automatic support, but paint on support Enforcers and change to Enforcers Only, so you get control of where supports are placed.

Respondido : 16/05/2026 8:10 am
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Kyle Kerby
(@kyle-kerby)
Trusted Member
Topic starter answered:
RE: How to selectively delete automatically generated supports

I should have mentioned one other thing. I can't paint on supports because the only places that I need them can't be seen from manually zooming into the model. It's a couple of overhangs that I can't access to manually paint supports onto. Auto generated supports catches them great but also fills in the holes. See attached photo because I'm not good at explaining things.

Respondido : 16/05/2026 2:47 pm
Neophyl
(@neophyl)
Illustrious Member
RE: How to selectively delete automatically generated supports

Yes you can, use the clipping function of the paint tools.  Alternatively you can use a support enforcer mesh to enclose specific areas, any surface inside the enforcer mesh counts as being the same as painted when it generates supports.

https://help.prusa3d.com/article/paint-on-supports_168584   look at the clipping section.

Respondido : 16/05/2026 3:06 pm
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