The Block command is an RWX Command that creates a "block" of the given dimensions in the current clump.
Block x y z
This command creates a "block" of the given dimensions in the current clump. The block is transformed by the current transformation matrix and its surface is assigned the current material.
x the width of the block in decameters
y the height of the block in decameters
z the depth of the block in decameters
It is not legal to specify a block dimension of zero.
block 0.1 0.2 0.1
This will produce a block with a height of 2m and a width and depth of 1m centered around the origin. That means half of it will be below ground.
The example below will create a textured box with the above attributes. The texture will be wrapped around the block for a reasonable look, but there is no control over it. Make sure that the block command is after the surface and texture lines, or you will get a black untextured box
modelbegin clumpbegin Surface .7 .8 .15 texture ground34 block .1 .2 .1 clumpend modelend