I have been having tremendous difficulty making holes through a rectangular cuboid. I draw a rectangle, pull the top surface up to make a solid object, draw a circle on the top of it, push the circle down through the solid, but I never see the colour distortion that people speak of. If I continue to push, it makes a bar sticking out of the other side of my solid, but at the point that the hole meets the bottom surface, something changes - the circle around the bottom of the hole appears to go more solid. It still leaves a selected circle, however, and if I flip the model over, there is a circle on the bottom side, but I can’t see through the hole. If I now delete the selected circle, which is coincident with the bottom side, it deletes the entire bottom side - so that’s apparently what I was seeing at the bottom of my hole - the inside surface of the bottom of my cuboid. If I flip it over, it looks like the inside of a shoe box, with a tube attached to the top surface.
Well, after a lot of fiddling about, I eventually got the four holes I wanted, but I got to wondering - if the bottom of the hole was not parallel with the surface it is piercing, what then? What if I make a cylinder, and want to make a hole perpendicular to its longitudinal axis (in other words, a hole through its diameter)? In that case, the bottom of the hole could not be parallel with the either the entrance or exit surfaces, because they are both curved. I looked for variations of “hole through a cylinder” on this forum, but it didn’t get any hits. Is it even possible with Make? (I know the pro version has a lot more capability).