Apart of the booleean operator is there a way to make the top hole go trough the wall of the hozontal hole:confused:
Tanks & Salutations
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It can be done manually, but what trouble are you having with the boolean operation?
If it doesnāt give the result you want by it self it can at least give you the vertices you need at the intersection points. Then just delete the extra verts and edges, remove faces around the area, and fill them in manually.
You might want to duplicate the āhole sectionā and work with it separately from the outer cube part
and then rejoin them later.
Boolean may work but the results are never quit what you expect!
iāll try it again and hopefully it ll work with this weird configuration
Salutations
I tried the Boolean difference and it does work because because the inside surface is inside an outer cube shell ?
So forget he boolean it is not working !
What else can be done?
Salutations
booleans seem to work fine for meā¦make sure that you invert the normals of the tube so that they are on the inside before you do the boolean intersect 
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You started with a real cube and a cylinder then apply the difference boolean operaator - That might work
But this not what i have - Look a the picture
But iāll tri it with the the cube and see what happen and be back soon
Salutations
I did it with an ordinary cube + 2 cylinders
and it work fine!
But what i had was a cube with a top surface with a circle face - under circle there was the face of the horizontal cylinder
and i ended up with this pic
and itāsprobably where the problem was
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So you got it to work? Good!
BTW, What are you making?
for ordinary cube yap!
But not for the cimplicated object i had
i used the K nighf to roogly cut the outer shell of the horizontal cylinder but thatās not very nice
but has it is inside a cube you normally donāt look at this part
still iād like to find a better cleaner way of doing it
Salutations
Would you like to post the file so we can have a closer look?
yeah, posting a blend would probably be a good ideaā¦ I am still not sure what you want to do hereā¦if you donāt want the vertical (green) tube, and just want the holes in the top of your cube and the horizontal tube, all you have to do is select all of the green faces and delete themā¦is that what you wanted?
btw: I used boolean intersect, not difference
when i began i should have use the Cube and boolean operator
But instead i began with a simple plane then added on ā¦
itās when i tried to make a hole trough the horizontal tube that it did not work
i cannot up load a Blend file with this message
do you have a good free place where i can upload this blen file
Tanks & Salutations
Salutations
Your ISP account may include some free web space.
Give 'm a call and find out. Or you can try a place like GeoCities or Tripod.