I’ve been using Blender for quite a while now, but I can’t for the life of me figure out the rules governing the left-click placement of the 3D cursor. While it does always appear under your mouse, the Z-depth is always entirely unpredictable. Sometimes it will appear on the grid. Sometimes right in front of the camera. Sometimes a looooong way off behind the scene. If I click the same place 5 or 6 times fron different view angles it will sort of appear in the general vicinity of where I clicked, but never with any precision. It also works works reasonably well if I use the quad-view orthographic projections, but I almost never work that way so it’s not much help.
For a while, I think around 2.55 or 2.56, it worked by snapping to the surface of whatever you clicked. I thought to myself “They finally fixed it! This is so awesome!”
But now with 2.58 I click and the cursor location is unpredictable again. Could someone explain to me the exact rules that govern the placement of the 3D cursor?