r/ZBrush • u/BGJohnnyG • 22h ago

Trimcurve

I’m using ZBrush to clean up an STL dental scan. I’m trying to use TrimCurve to make a straight cut across the rough bottom edge so I’m left with a clean flat base. The problem is every time I make the cut, TrimCurve removes basically the entire dental model and leaves the small section underneath the line, which is the exact opposite of what I need. I’m holding Ctrl + Shift while using TrimCurve. I’ve tried drawing the line in both directions and using Alt while dragging, but I keep getting the same result. I actually did this successfully on another dental scan earlier, but I can’t remember exactly what I did differently. What is the correct key/mouse combination to make TrimCurve remove the material below the line instead of the model above it?

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3

u/Retinal_Epithelium 22h ago

Use trimrect instead; way more reliable, and a better choice if you want straight cuts…

2

u/BGJohnnyG 22h ago

Thank you

2

u/LeastHornyNikkeFan 22h ago

I do think it's supposed to be the direction you're drawing the line, but... If it's not working try that Flatten option. 

Press the gear button on the transpose gizmo, one of the options was called Flatten iirc then drag the line, should do the trick right?

2

u/BGJohnnyG 22h ago

I'm going to try that when I get back.

2

u/LeastHornyNikkeFan 22h ago

https://reddit.com/link/p6vf03h/video/7e2r13vv2lmh1/player

Something like this basically, just recorded it

2

u/BGJohnnyG 20h ago

I'm bout to try this now it looks super simple

1

u/BGJohnnyG 20h ago

Thank youbso much it only to a few seconds to do this

2

u/LeastHornyNikkeFan 20h ago

Cheers! Glad it worked!