On gametutorials.com there is a tut about multitexturing. i understand that but how do i have to modify the code to get one of the two textures transparency? i think its something about EXT_texture_env_combine . but i dont know how it works and if its true that i have to use that... i also have another question. my first language is not english thats why i dont understand what does bump mapping mean...

Hey dont worry about your English, even those who speak the language natively dont understand what bumpmapping is lol.