Hello, I recently just found a new glitch that allows you to place floating blocks, as well as place multiple blocks at one in a prebuilt structure, which I will call inventory placement. For inventory placement, if you pick up a block and place a block on the same or next few frames (not sure the range, but the same frame always works and can be done simply by pressing the left and right mouse buttons a the same time). At first it looks like you deleted a block, but in reality, you placed a block on another block that is now inside you inventory, and both will be placed at the same time, in the same way (you inventory is a queue, so you have to place other the other blocks first). Further if you inventory place one of these block combos, the entire structure will say together. The three possible uses of this I have found so far are: placing blocks below the camera, inside of other blocks or yourself, and on active energy blocks.

To place floating blocks, place a block a couple of frames after picking up a block. This allows you to place a block into the world, while picking up the block that it was resting on, in effect giving you a ghost block. Although I have not been able to place ghost blocks directly on each other, you can still create multiple in the same structure.

Here is a video of me playing around with these glitches:

I am not sure how much these glitches will effect current routes (other than small optimizations in placing blocks), but for example, level 1-2 only requires 2 blocks now, since you can create a ghost third block when setting up the final jump.

This is really awesome! Thanks so much for finding this!

Update based on meggachilly's steam and personal testing: Turns out that if you stand on a block about to disappear due to the inventory placement glitch, you get a really high velocity in a specific direction (an upwards diagonal), often sending you out of the map, but if there is something to catch you, it can save a lot of time traveling upwards.

Figured out more about teleportation. If you place the block that was picked up in a CPG before the teleport happens, you teleport to where the block is placed, instead of 1000,1000,1000.

Not sure how helpful this would be, but it might allow teleportation in a couple of places. For example, a 2 cube strat for 1-2 is fairly easy, and wall climbing is faster, though risky.

Followed the natural next step, of doing a fast placement into a cube storage, to store a floating block...

I really really hope this is useful. Potentially could be used to put blocks in really hard to reach areas