Originally posted by Kattla:

Actual costs:
1x1x1 = 2 marbles (used as standard for comparing the other blocks)
2x1x1 = 4 marbles
2x2x1 = 4 marbles (It should logicly cost twice as much)
2x2x2 = 8 marbles (It should logicly cost twice as much)

I do agree with the OP though, If the piece he/she is looking for is already in the game, adding it to the build menu should be possible.
We do have 4x2 for regular stone (cost 6 stone) , so a 4x2 for black marble wouldn't be out of place. Or as the OP asked for, a 2x2 with a thickness of 1.

After all, it only adds to the game, it doesn't subtract nor nerf , so i would welcome it.

the problem is you simply cannot add BASIC build pieces for the same stuff later on after people build thier big bases. this would punish them way too hard. all basic pieces should be in the game now. adding them later is just stupid now as that would force a restart for everyone. mighrt be able to add these with ashlands of course since that will force a restart of the world seeds anyway sadly.

its the same for the marble plints. there is one which is twice as wide as the current sloped ones on the dvergr towerrs. but you cannot make it as a player. so makeing 2 of these costs 10 marble. but covers the same size as a big block which costs 8. they look alot better tough so maybe thats why.