I used to be able to do a trick where facing down and pressing 'x' while holding a box and standing on a box would allow me to jump to the top of the two box stack. Now I can't do this trick anymore.

Was this patched out of the game, or maybe I'm mis-remembering how to do the trick. If anyone knows of this trick thanks for any help.

Cube Stacking requires more than just dropping the cube while you are on top of it.

Step 1: Go up against a wall with you back against it with cube in hand: https://imgur.com/a/mxiRg

Step 2: Place the cube where you are inbetween the cube and the wall. The cube cant be too far away nor to close to the wall. I recommend finding a setup with the wireframe of the cube and your FOV. https://imgur.com/a/y1FfD

Step 3: Grab the other cube and go on top of the cube with your back to the wall. http://imgur.com/a/I1ESl

Step 4: Jump and Place the cube at the same time. https://imgur.com/a/4OQzT

Some cube stacks are easier than others and there is also other ways but this works anywhere.

Thanks, that worked well. I could have sworn that I used to be able to jump to the top of a two box stack while sliding out of it if I had set the box down by pressing x. It doesn't work at the moment though and your way does, so thanks.