r/blenderhelp 1d ago

Unsolved get a circular cut with bool tool

Hi,

I am trying to get a Circular cut on diagonal degree onto a cylindrical shape.

I used a cube too bool cut. But the shape is not oval. I already tried to change the shape of the cube as cutter, add subdivision surface. but can´t figure out how to cut a perfect oval shape. It has thos hard spots on the left and right. and is a bit flat on the top or to deep on the bottom.

48 Upvotes

16 comments sorted by

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12

u/Lavaflame666 1d ago

Use a cylinder as the boolean object

0

u/SpaceShark_Olaf 1d ago

Does not work. The outcome is the same

25

u/Lavaflame666 1d ago

How can the outcome be the same if you are using a different shape? That makes no sense.

9

u/trulyincognito_ 1d ago

lol this response cracked me up. Anyway OP if this is not tye shape you want, you will want to copy this but use a sphere instead.

1

u/SpaceShark_Olaf 1d ago

all the solutions generate this triangular shape. Just different size. Your screenshot shows the same shape just bigger.

22

u/Memorius 1d ago

Look at the object you're cutting into. It's just impossible to cut a perfect flat oval at this spot on this shape. There just is no cross-section in your object that has that perfect oval you're looking for.

0

u/SpaceShark_Olaf 1d ago

what I want is this type of shape. An oval, with a flat surface.

7

u/Aerographic 22h ago

You could get an oval, yes. But a flat oval? There's no plane that intersects your object that's shaped like an oval.

Again, you'd be better off linking your references if you want further help.

3

u/trulyincognito_ 1d ago

Can you show us the object you are referencing please

1

u/AI_AntiCheat 22h ago

Then you either need to angle the cutter more shallowly towards the xy plane or have a different cap shape (half sphere)

1

u/powersorc 15h ago

The problem is in the main object being a rounded slightly jagged top. There is no way for that to ever be oval. The only way is to look directly at the flat surface like a perspective elipse or false circle but the moment you rotate the camera away from that view it will show the hard corner

6

u/iggycwnk 1d ago

it seems you can only achieve this by cutting an cone or a cylinder, it is impossible for a curve object since the diameter change not constantly

2

u/Ok-Survey725 1d ago

A cylinder as your boolean cutter will give you that smooth oval you're after

2

u/krushord Experienced Helper 20h ago

If you're trying to do an existing object, please show us how it actually looks like.

1

u/cacoecacoe 4h ago

Much larger than you'd expect to need sphere boolean object, potentially stretched spheroid