Free Hero Mesh

* Shift: Shift the picture. Specify the sizes and shift amounts in the
format "size: shift"; each size also affects all multiples of that size,
in which case the shift amount is also multiplied by the same amount.


=== Multidependent pictures ===

(This section describes a feature of which the editor is implemented, but
it is not implemented in the game yet, as of this writing.)

A multidependent picture lump defines several pictures which are formed
from one or more independent pictures and filters, using common sets of
base pictures and filter chains.

You can define a list of up to 63 bases and up to three lists of filter
chains each of which may contain up to 63 filter chains; all pictures are
generated which take all combinations of one item from each list.