Basic Geometry

[earth-video]

Basic geometry question. I am try to boole out a shape, but when I add a suddivision it creates a hole.
When I add lines to help with the geometry I keep getting the hole, not the part I want cut out.

Any ideas what I'm doing wrong guys?

[earth-video]

[Dr. Sassi]

Hi earth-video

Please share the file. The geometry will be below 1MB. I can then share a file back that works and share some thoughts.

From the images, I can only guess, which is not a good idea, as I have to make assumptions.
Like: do you Boole a cube from another and then add an SDS, while leaving it on N-Gons? N-Gons and SDS rarely work well together.

Image-based: Why not "Slide" the neighbor-edge to get close to the intended Cut-out, add a loop in the middle of the small side to get that edge as well, then delete the polygons where the Cut-out should be, and create a few new polygons, then add supporting edges. Check that no N-Gons are left and explore the SDS again.
(Attribute Manager> Mode> Modeling> Mesh Check)

All the best

[earth-video]

SUNGLASSES.c4d

[Dr. Sassi]

Hi earth-video,

Thanks for the file.

The supporting edge is an old and good technique, but sometimes, the SDS Weight is faster and easier to use:
https://help.maxon.net/c4d/2026/en-us/Default.htm#html/OSDS.html#weight
perhaps also here
https://help.maxon.net/c4d/2026/en-us/Default.htm#html/TSDS.html

To build the Arm of the Glasses, I took just the outside of the frame (Split) and welded a lot of points first. With that, I extruded it and added the details. To keep the polygon count of the main object low is always my target. Like in Illustrator, the more points are given for a specific area, the less power each point has. However, at the same time, it becomes increasingly difficult to manage.

The functions, options, or tools I use are as follows: Extrude, Inset (extrude Inner), Weld, Slide, Dissolve, and the Knife tool. Those are essentials for me.

Here is your file back.

CV4_20226_drs_25_MOsg_01.c4d

Please let me know if you have any questions. I'm happy to look into it.

Cheers

[earth-video]

Very nice.
Thank you very much for the help.
Truly appreciated!!!

Have a nice day.

[Dr. Sassi]

You're very welcome, earth-video.

Please let me know if you have any questions about this model; I'm happy to look into it.

My best wishes for your project.