Support edges without pinching

[Alexaurus]

Hello!

First time posting here, so sorry if this is not the correct topic and sorry for my english!

I have this mesh with this hole and I want to add support edges to make the hole more rectangular when adding the subdivisions later. I want to avoid harding other edges and creating pinching. Which is the best way to accomplish this?

First picture is where I want to add support edges, second the mesh to make more context of the situation,  the third the blue circle is what I want to accomplish and yellow rectangle is what I want to avoid.

THANKS!

Where I want to add support edgesGeometryBlue circle is what I want to accomplish, yellow rectangle is what I want to avoid

[damaggio · Accepted solution]

This is a common mistake when learning SubD modeling, I suggest watching tutorials that specifically covers hard corners on cylindrical shapes.

https://www.youtube.com/channel/UCG2srhdMHCa4OofVCbcwRXg

[Alexaurus · Accepted solution]

Thanks for the fast reply! I will check it!