A transformation can be applied to a brush or globally to modify where and how blocks are changed.

See also: http://wiki.sk89q.com/wiki/WorldEdit/Region_operations#Deforming_regions

Use a comma (,) to randomly use a transform from a list e.g. #offset[0][1][0],#pattern[wood] (offset the block one up, OR change it to wood)

Use an ampersand (&) to use multiple transforms for each block e.g. #offset[0][1][0]&#pattern[wood] (offset the block one up AND change it to wood)

Transform arguments should be inside square brackets e.g. #offset[0][1][0]

Perm: worldedit.global-transform
Desc: Set the global mask

Perm: worldedit.brush.options.transform
Desc: Set the brush mask (separate multiple masks by spaces or colons :)