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Repeat 'Add negative volume'  

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brianjordan
(@brianjordan-2)
Trusted Member
Repeat 'Add negative volume'

Using PrusaSlicer 2.9.5 I would like to trim a couple of aspects of an stl by using the 'add negative volume' tool. The stl is a representation of our village obtained through the map2model.com site and although the result is mostly very good I need to trim a couple of buildings as one is too tall and one is too long. I can add negative volume to either one but not both to obtain the result I need. Researching this it seems that the effect is only applied when the model is sliced so there is no way back to apply the effect again. Unless you know different?

This topic was modified před 1 day by brianjordan

Flashforge finder -> Flashforge Creator Pro -> Prusa MK3S -> Prusa MK4S ->???

Napsal : 15/06/2026 3:18 pm
Neophyl
(@neophyl)
Illustrious Member
RE: Repeat 'Add negative volume'

You can add multiple negative volumes to a model in the slicer but yes those volumes do not actually change the underlying model, they only effect the output of the slice.

If you want to make changes to a model then do it in CAD.

Napsal : 15/06/2026 3:31 pm
ssmith
(@ssmith)
Estimable Member
RE: Repeat 'Add negative volume'

You might try exporting the plate as an STL after each use of the tool, then loading that STL for the next edit. 

Napsal : 15/06/2026 4:32 pm
brianjordan
(@brianjordan-2)
Trusted Member
Topic starter answered:
RE: Repeat 'Add negative volume'

Thank you, I'll give it a go.

B

Flashforge finder -> Flashforge Creator Pro -> Prusa MK3S -> Prusa MK4S ->???

Napsal : 16/06/2026 10:39 am
brianjordan
(@brianjordan-2)
Trusted Member
Topic starter answered:
RE: Repeat 'Add negative volume'

Thanks. I didn't realise that was possible. Something else to try...

B

Flashforge finder -> Flashforge Creator Pro -> Prusa MK3S -> Prusa MK4S ->???

Napsal : 16/06/2026 10:41 am
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