Making a hole
Can anyone help, I want to put a hole through an object. Normally if I want around hold I make a cylinder move it into the position I want the hole going through the object I want to put the hole in, and I select the object I want to make the hole and then shift select the cylinder and go Polygons, Booleans, Difference and this normally works fine.
However a few times now, if I have created an object and model it, pull and push vertex extracting edges and face etc and then I want to put a hole through something and I repeat the steps above the original object disappears completely. Can anyone through and light on whats going on.