Adjusted lightning so its not so ridiculously high into space

Also reduced lightning player hit frequency

Switched the voxeldefinitions to use default keen materialdefinitions so all of the particles and impacts and stuff should work properly.

Reverting to original version to bring the red grass back. Will try to figure the correct way to get the sounds back in the future.

Hopefully fixed the Red Alien Grass from reverting to Alien Green Grass

Changed custom AlienRedGrass to instead replace AlienGreenGrass in order to retain wheel engine sounds and dust particles.

Same as above for the GaladosV_Ice