I found a concept i've made for my map fy_pool_day back in 2012 in which you were able to switch at any time from the version i made (with "csgo graphics") to the original version of the map (made by Squall on CS 1.6) by just switching a lever.
Here on this test version, there was no button/lever, you had to shoot at a box in the middle of the map :
http://m.youtube.com/watch?v=v-njp5ekq3Q
Try to guess how i did it ![]()