I'm curious if this happens with all Intel cards now. The game was supposed to work fine on Intel HD 4000, 4400 and 5000 adapters, so I guess a recent Intel driver might be responsible for this trouble However, you can fix this issue by setting "graphic_water_postprocessing" to false in the "config.properties" file in your game directory (but unfortunately this disables all post-processing effects for water)
Actually, I booted Rising World on my laptop today just for testing, I got a new thing to cool it down so I wanted to try performance...I have an i7 2630QM running at 2.00 ghz, 8 gb of RAM and a 1 gb Radeon 6490M video card (which is what I tried running the game on) and had the same issue. I also have an Intel HD (it's switchable) but I was using the Radeon one at the time, didn't test the Intel one anyway, as the framerate is so low I can barely even move (but this is a problem with every game that requires a bit of power, unfortunately, as the card itself has shared memory with the system, so I can only use 512 mb to actually play...thanks to the guy who sold me this thing)
So yeah, tl;dr I have the same issue on a Radeon 6490M, and have a switchable Intel HD card that I don't really use. Should also mention that both cards have dated graphics drivers from 2011, Intel HD graphics card (can't see which series is it though) runs on driver 8.830.6.1000 dated 27/01/2011 Radeon card has the same driver number (not really sure about this) but driver date is 15/03/2011)
Actually, gonna attach dx diag files so you can take a closer look at it if need be.
Also can't seem to quote your previous answer, but yeah, would be nice to have sand on lakes shores or somewhere you can find it in other biomes or maybe work something with dirt to make sand out of it...I don't know, that could work too.