Trying to create a blueprint for an IE Tank, shift right click with sketch to select starting block:

Now select top opposite corner block of tank:

Create blueprint and try to place it. It gets placed 2 blocks below ground level (why?):

Make a 2 block deep hole for the tank:

Not the ideal situation, but this works.

What should happen: Blueprint should start over the block the user is pointing at, not 2 blocks down.

That's because the main grid always starts at the origin. So your y-level is just 2 above a multiple of the vertical grid size. Mm, I think I'll just adjust the initially stored sneak-scroll-shift to be such that the blueprint would be placed at the original sketch location.

441b8c6