As others have mentioned, be best to make the terrain less rounded, metal has sharp edges, not round corners. (generally)
A typical command line entry to make a metal map that I use would be:
wine MapConv.exe -i -c 0.1 -n -109 -x 146 -t bigmetal.bmp -m metalmap.bmp -a platformheight.bmp -o platformriver.smf
Its the lack of the -l bit that sharpens the edges, so make sure there is no -l.
OCW for Spring
Moderator: Moderators
does indeed not support shading, and everyone is free to modify the .smd to his/her likings and upload it. Unfortunately my very nifty graphics card does not support skyboxes aswell....maps should come with an option to NOT install them....or have an integrated option in springsettings to turn that option off.