No there isn't. All the scenery and ride limits are encoded into the game and cannot be altered- notice they're all binary numbers- e.g. 8, 16, 32, 64, 128 etc... I agree its really annoying, as I always have to limit how much scenery I can use. And also, I find that because of these limits Wacky Worlds (and most likely, Time Twister) are pointless.