i'm trying to use glTexImage3D (or glTexImage3DEXT) but it seems that my ATI9000 doesn't support it. It's true or not? if yes, there's another function i can use instead? i use this code : /*main.h*/ typedef void (APIENTRYP PFNGLTEXIMAGE3DPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels); extern PFNGLTEXIMAGE3DPROC glTexImage3D; /*main.cpp*/ glTexImage3D = (PFNGLTEXIMAGE3DPROC) wglGetProcAddress("glTexImage3D"); if (!isExtensionSupported("glTexImage3D")) printf("error");

According to the Extension Data Base on www.delphi3d.net you graphic card should support this extension. Try to use:

wglGetProcAddress("glTexImage3DEXT");

i've already tryed this... doesn't work :/

My ATi Radeon 8500 does support it, and it's almost the same chipset as your Radeon 9000.
When you query the glGetString(GL_EXTENSIONS) string, do you see "GL_EXT_texture3D" ?

[edit]
I've just written a program again and both "glTexImage3D" and "glTexImage3DEXT" are valid function names.
However, how does work your isExtensionSupported function ?
Shouldn't you test this instead :
if (!isExtensionSupported("GL_EXT_texture3D")) printf("error");

now it works :D but i still dunno how i did it o_O

Would you like me to explain the functions I've posted ?
I'd be more then glad to do it.