Tangent Handles are missing!

[apaque205Q6LY]

Is there something I have to turn on to show the tangent handles when I am editing the vertices on an object in sculpt mode?  Could I have possibly modified the shape in a way that has shut the tangent handles off?

Thanks,

Adam

[NicolasXu]

Hi Adam,

Tangent handles control the transition of the T-Spline faces at a creased edge or the end of an open body. You may take a look at the video below. 

http://fusion360.autodesk.com/learning/learning.html?caaskey=caas/CloudHelp/cloudhelp/ENU/Fusion-For...

Best Regards,

[apaque205Q6LY]

Thank you Nicolas, I got it now!

[simon.dyer]

Hi - that link doesnt seem to be answereing the question any more.  I too have missing tangent handles.

[simon.dyer]

Please can someone help me - why cant I access the tangent handles on most points in Sculpt mode?  I brought this surface as a face from modelling, and added some points hoping they would have tangent handles to shape this face
@jeff_strater

[laughingcreek]

The answer remains the same.  There will only be tangent handles at creased edges and open edges.  just like in your screen shot.

[mavigogun]

Control of non-Edge geometry is primitive;  I often resort to eliminating and rebuilding entire sections just to change the tension/character of a single segment.   That said, Alt+2 will display the Control net around the T-spline, affording some degree of control.    With Edit, a scaling an Edge provides some ability to remove kings and curves.   Some.

[TrippyLighting]

Few tips:

1. Reduce mesh density by removing edge loops. Add detail after you are satisfied with overall shape and proportions

2. Model at lest 50% in box view mode.

3. If the need for modeling with dense meshes arises, enable soft soft modification in the Edit Mesh dialogue and adjust settings to your needs.

[osman-pasha · Accepted solution]

Hi. I still think there is a problem with missing tangent handles. Here is a screenshot with creased edge (bold) and no handles at all. For some reason sometimes I get 2-3 handles (out of a dozen points on a creased edge). I can't say when they appear of disappear.

[TrippyLighting]

All I can say is that generations of Sub-D modelers have created sophisticated models, did not have tangent handles, and did not need them.

Keep your fingers away from the T-spline tangent handles and your models will be much happier!

[osman-pasha]

Regardless, it looks like a bug to me. Bugs need to be reported and fixed.

[TrippyLighting]

Agreed! Can you share the model?

[osman-pasha]

Sure, here it is. Today I have only 1 handle per whole model.

[TrippyLighting]

I m not quite sure yet, but after playing around some with this model I think this has to do with the number of triangles and N-Gons in your model. There should not be triangles in this model and I believe it should be possible to model without N-Gons as well.

[osman-pasha]

Thank you for your response!

Here is another thing to consider. On a screencast I create 2 identical cylinders and add caps to them. 1 cap is made with "Fill Hole -> Collapse" option, and it has all the tangent handles, another hole is filled manually with "Insert point" to the exact same topology, but it has no tangent handles. So while the issue might be related to non-ideal topology, it is triggered by some internal state of Fusion that cannot be viewed via topology (same topology - different result).

Tangent handles missing on cylinder caps | Fusion 360 | Autodesk Knowledge Network