Glynn Clements wrote: > 1. I need to extend g.pnmcomp to allow it to output an alpha (mask) > channel. Done. The outmask= option will write the alpha channel as a PGM file. BTW, I had to modify gis.m's mapcanvas.tcl to use output= rather than out=, as the latter is now ambiguous. -- Glynn Clements <glynn at gclements.plus.com>