Display Loses Connection On Earth Tile Set

[Hmm...interesting.]

Occasionally when playing on the Earth tile set, my display loses connection. Everything seems to be running fine, but my monitor is black and shows "NO DVI INPUT." It only happens in Warframe, and only on the Earth tile set. I doubt it's the monitor or the monitor connection, since unplugging and plugging back in the cords doesn't work. Not sure if it's my graphics card or something else, but I end up having to force restart my computer for it to turn back on.