Try blocking out both shapes before connecting them and use the existing geometry in the curve as part of the support loops around the base of the intersecting cube. That way the support loops on the intersecting shape can flow directly into the edges of the underlying curve without disrupting the segment spacing.
Here's a quick overview of what that could look like.
Below are a couple of links to other write-ups that cover relevant topology routing examples in greater detail:
Thank you so much Frank Sir ! Thanks for your overview. Subdivision is overwhelming , Thank you for sketchbook references a big help for beginners like me . Also will defenitely read forum information, Thats my fault. Thanks once again. Now lemme see what i can do.
The really short answer is: there needs to be enough geometry in the larger curve to support the smaller details cut into it. How much more geometry is required really depends on the tools and order of operations used to create the model.
It's generally considered best practice to adjust the number of segments in both the underlying curved surface and the intersecting shape until the edge segments in both roughly line up with each other. That way the edges that make up the curve have consistent spacing and can also be used as part of the support loops around the intersecting shape.
Over the last few pages there's a couple of brief discussions about how to cut out details on curved surfaces. Even though the shapes are slightly different the basic principles discussed there can also be applied here.
Even further back in the thread there's a longer discussion about how to approach modeling this exact shape. So definitely check out the different solutions proposed there. A couple of them use very lightweight meshes and still produce good results.
So lots of different ways to approach the modeling part. The basic
shapes and topology routing can be done on a flat strip then bent into a
curve.
Or everything could be done directly on the surface of a cylinder primitive with more geometry.
What most of these examples have in common is the segment spacing on the curves is kept fairly consistent. Which helps prevent shading artifacts caused by unwanted surface deformation when subdivision smoothing pulls unsupported areas out of shape.
Replies
https://polycount.com/discussion/comment/2769713/#Comment_2769713
Can you explain how to have a clean side? I've read all the references, but it's not easy
Over the last few pages there's a couple of brief discussions about how to cut out details on curved surfaces. Even though the shapes are slightly different the basic principles discussed there can also be applied here.
https://polycount.com/discussion/comment/2803553/#Comment_2803553
https://polycount.com/discussion/comment/2790736/#Comment_2790736
Even further back in the thread there's a longer discussion about how to approach modeling this exact shape. So definitely check out the different solutions proposed there. A couple of them use very lightweight meshes and still produce good results.
https://polycount.com/discussion/comment/2691076/#Comment_2691076
https://polycount.com/discussion/comment/2699006/#Comment_2699006