SFM can load most maps, the main thing is that the limits of its engine version are not exceeded, and for reflections, env_cubemap with a size of 128x128 and higher is used, otherwise there will be artifacts.
P.S. - for some reason I didn’t see a link to myself or to the submerge map (it’s in the screenshots)

@SFMspideyfan. Download the mediafire link and unzip the contents. there should be a "map" folder, drag and drop it into SFM's usermod folder (steamapps/common/sourcefilmmaker/game/usermod)

the maps are cool but what,s the media fire file link for? and how do i put it?