Trouble with downloaded maps

Hi! I’m very new to gmod, so excuse me if this is a total noob question.

I recently downloaded a new map (RP_EvoCity_v2d.bsp) and managed to add it just fine (pasted the extracted file into the maps directory). However, when I loaded the map up in GMod, there were big red error signs everywhere, and a bunch of texture seemed to be missing or replaced with pink-and-black checkerboard pattern. Have I missed a file somewhere along the line, or what’s up?

If it makes any difference, my other Source engine game is The Orange Box, with all component thereof installed.

Thanks in advance!


It goes in addons

he probably needs to get phx or get counter-strike. im starting to see maps with phx props already in them.