[mhoyle]

i manage to do that with spheres and cubes and 3d shapes-

but when i try to create an odd shape with a polyline tool and then draw an elipse which is also flat and then maybe a square plane, each time i try to select any two of these flat objects and boolean union them one of them disappears completely.

is it not possible to do on flat objects?

the reason i'm wanting to do this is because sometimes i'll want to create a defined flat shape with perfect curves and other shapes and then extrude them into a 3d object.

so i thought using the perfect circles of the elipse and squares of the plane along with the polyline tool i could combine some more perfect shapes before i then extrude them.

hope this makes sense.