Boolean error¿?

[Capprim]

Hello Dr.Sassi!

I'm building things for a game project. I found an error with a Boolean that I don't understand, as I have other segments of the same type, with no errors. Please take a look at this scene; I can't use booleans if I use slice to the object 02. However it worked in other objects like that, see 01
Thanks for your helpBooleanError.c4d

[Dr. Sassi]

Hi Capprim,

The answer is simple, the "From-To" parameters in the Slice Tab produce flipped Normals if the From Value is larger.
Please have a look here.
CV4_2025_drs_25_MOrn_01.c4d

I have used a Revere Normal (Asset Browser> Operator> Reverse Normal

If you take the Cylinder and make it editable [c], you can see it in Polygon Mode with active Polygons that this kind of Slice setting results in reverse Polygon Normals.

I assume you want this object as a single Polygon Model for delivery. If that is correct, make the Cylinder editable, press the c key, reverse the Normals,
Mesh> Normal, Reverse Normals, and then make the whole Boole Editable by using
Object Manager.Object> Current State To Object function,
or the C key again

Otherwise, if your target allows for that, set the Cylinder as the one that is working and rotate it in place.

With a little math, you could set up both in negative values. Then the "From-To" will work with the Boole, and keeps the Normals correct.
CV4_2025_drs_25_MOrn_11.c4d

Will this work for you?

All the best

[Capprim]

Hello! The normals were wrong! Now is fine! Thanks a lot!

[Dr. Sassi]

Thank you very much for the feedback, Capprim!

Cheers