If I have a 3d model and want to measure the distance between two arbitrary points - there’s no tool that gives the dimension with leaders, so now I can’t: a.) Confirm that the dimension is in the correct place. b.) Screenshot the dimension to send to someone. Linear dimension not a problem: [d…

It asks for picking of a surface in case that it’s part of a polysurface. Or you mean lack of ability to pre-select a sub-object?

wonderfull thank you @Tom_P I really missed something like that in rhino! note: with the second macro: _CPlane _3Point _pause _pause r0,0,1 _dim 0,0,0 _pause _pause _CPlane _Undo you cant dimension vertical lines because the cplane wont change. best regards, sebowim

Another example where measuring in 3d fails: Diameter / radius: What I expect: [xtop_Nvcnl9mOB0] Rhino: [Rhino_CipscmVyJC]

This is something that was requested so many times during the years… I lost hope that it will be fixed a long time ago. You can make a macro to temporarily build a CPlane along the circle, then add the radius/diameter dimension, then revert to the previous CPlane. ! _CPlane _Object _Multipause _Di…

here is a python-script I made with chatgpt (via error-backfeeding, I am no programmer) in 10min for 3d-dimensions - the problem ist that it’s not associative maybe with more time the KI will make something for us.. If someone is interested you could just insert the script into chatgpt and prompt - …

PLEASE HELP ! _CPlane _Object _Multipause _DimAligned _Pause _CPlane _Undo _Multipause '_CPlane _World _Back

You have to pick a planar face to align the temporary CPlane first. Do you use Rhino 8 with AutoCplane enabled? Looks like something is wrong with the CPlane alignment by the end of your video.

Thank you, I’ll give it a try.

[image] noithatchiaki: ! _CPlane _Object _Multipause _DimAligned _Pause _CPlane _Undo _Multipause '_CPlane _World _Back I’ve tried it, but it still didn’t work.

Lack of persistent 3d dimension tool

Rhino

Gijs (Gijs de Zwart) February 27, 2026, 11:09am 67

you might find this script handy, see Measure Radius of Surface or Solid Fillet - #7 by Gijs

I know, this is an old feature request RH-50849 3D Dimension

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Lack of persistent 3d dimension tool

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