Don't waste your time with multiple terrains! A 1024 heightmap is big enough. Use the predefined multitexturing shader from MtlFX.c, it will take less than 10minutes to get it to work with your textures but it will save you hours of work you'd had with your current method. One big texture per terrain is outdated.
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual
