Question about regions

Dear FLUKA experts,
I tried to build a filter support with 9 holes in FLUKA (as shown below), but later I found that I couldn’t set any “body” in these holes. It seems that these holes were occupied by two regions.

(The image was drawn by solidworks)

Could you please teach me how to build this filter support?
I intend to set some MYLAR filters with different thicknesses in these holes.

Thank you so much for your attention.


Dear @21shzong,

I recommend you to start with the study of the geometry lecture and geometry editor lecture from the last FLUKA beginners’ course.
There, you will find enough instructions to implement your geometry.