EQ support large textures, i made test where i loaded 4096x4096 DDS textures, EQ, in term of textures, is only limited by your hardware.
If i use 512x512 textures, load zone in OZ, compile as S3D, and then open SpyEQ to change 512x512 textures by larger one (2048x204
, it work fine when i play under EQ ...
EDIT : It appear water is bugged, with irregular form. When i make a rectangular water under max, it appear irregular under OZ water setting and never show up (on OZ and EQ).