different types of different boundary boxes

hello!

i have met with the aspect of the game that does not let players color a complete block behind a corner block due to the corner block's boundaries shadowing this possibility.

i have also met with the aspect of the game in which the players can not place a different grid onto a rotor block without the rotor block consisting of two boundary boxes - one at the body, and one for the head - in order to be able to build two separate grid onto the same rotor

for this i would like to suggest to introduce different types of such boundary boxes, and let certain boundary boxes overlap in order to facilitate for example painting through parts that does not obscure a part behind it fully, and for you to be able to introduce rotors that are 1x1x1 due to the boundary box at the rotor's head may possibly overlap other boundary boxes facilitating the player to build blocks in front of the rotor head, not necessary on the rotor head's grid. so a rotor will consist of two boundary boxes the same, but the one at the head is not so rigorous, and for painting the act the player selects painting tool all boundary boxes will become less rigorous to the painting tool regardless of the boundary box's type