Hello, I''m having some problems with the glTexGen function. I''m trying to texture map a cube but can only seem to get it to texture the front and back. When I just use glTexCoord all sides texture properly. I don''t think I properly understand how to set the s_vector and t_vector values. Could anyone offer some guidance? Is there a good example of 2D automatic texture coordinate generation on the net? My code sample: GLfloat s_vector[4] = {1.0, 0.0, 0.0, 0.0}; GLfloat t_vector[4] = {0.0, 1.0, 0.0, 0.0}; GLfloat r_vector[4] = {0.0, 0.0, 1.0, 0.0}; GLfloat q_vector[4] = {0.0, 0.0, 0.0, 10000.0}; glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR); glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR); glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR); glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR); glTexGenfv(GL_S, GL_OBJECT_PLANE, s_vector); glTexGenfv(GL_T, GL_OBJECT_PLANE, t_vector); glTexGenfv(GL_R, GL_OBJECT_PLANE, r_vector); glTexGenfv(GL_Q, GL_OBJECT_PLANE, q_vector); glEnable(GL_TEXTURE_GEN_S); glEnable(GL_TEXTURE_GEN_T); glEnable(GL_TEXTURE_GEN_R); glEnable(GL_TEXTURE_GEN_Q); // Enable texturing glEnable(GL_TEXTURE_2D); // Call the texture glCallList(BlueDenimTexture); glBegin(GL_TRIANGLES); // Right Side glNormal3f( 1.0f, 0.0f, 0.0f); glTexCoord2f(0.0, 0.0); glVertex3f( 0.0f, 0.0f, 20000.0f); glTexCoord2f(1.0, 0.0); glVertex3f( 0.0f, 0.0f, 10000.0f); glTexCoord2f(1.0, 1.0); glVertex3f( 0.0f, 10000.0f, 10000.0f); glTexCoord2f(1.0, 1.0); glVertex3f( 0.0f, 10000.0f, 10000.0f); glTexCoord2f(0.0, 1.0); glVertex3f( 0.0f, 10000.0f, 20000.0f glTexCoord2f(0.0, 0.0); glVertex3f( 0.0f, 0.0f, 20000.0f); // Left Side glNormal3f( -1.0f, 0.0f, 0.0f); ... I don''t seem to need the r and q vectors. Instead I can just divide the s and t vectors by q and get the same result. If I change the t vector to GLfloat t_vector[4] = {0.0, 0.0, 1.0, 0.0}; then I can get the top and bottom to texture but not the front. Also, this texture appears flipped backwards. I can''t seem to find a combination that will allow all sides to show the texture correctly. The Red Book was helpful but only has a 1D example. The glTexCoord calls aren''t needed - they were just there so I could prove to myself that I was texturing correctly. Any suggestions?