I have noticed a long time now in the other CM games that no matter if I have Shaders "On" in the Advanced Options, some scenarios (not all) always start with shaders off, and each time a load a save for that scenario the shaders are off again. This seems to be the case in the SF2 demo as well. But I have also noted that having "Tree detail" set to "Low", the Day at the Beach scenario has no trees/tall grass swaying (as they should), but in Alamo they always do (and there is no toggle for i