unable to have both high-res player skins and high-res sentry skins

[Xylemon]

https://sourceforge.net/p/fteqw/tickets/76/

drzel1 wrote on 2020-01-19:

gl_nocolors 1 allows sentry skin to show, but player model skins are lost (leaving base player skin). gl_nocolors 0 leaves black sentry.