# OpenGL: missing GL_SPECULAR light on the texture

I'am missing specular lighting on the texture. I have #include <GL/glext.h> in the project, so basically I used glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL_EXT, GL_SEPARATE_SPECULAR_COLOR_EXT); for specular effect. My init code:

glEnable(GL_DEPTH_TEST);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glEnable(GL_CULL_FACE);
GLfloat AmbientLight[]   = {  0.3,  0.3,  0.3,  1.0 };
GLfloat DiffuseLight[]   = {  0.7,  0.7,  0.7,  1.0 };
GLfloat SpecularLight[]  = {  1.0,  1.0,  1.0,  1.0 };
GLfloat Shininess[]      = { 90.0 };
GLfloat Emission[]       = {  0.0,  0.0,  0.0,  1.0 };
GLfloat Global_Ambient[] = {  0.1,  0.1,  0.1,  1.0 };
GLfloat LightPosition[]  = { 7.0, 7.0, 7.0,  1.0 };

glLightModelfv(GL_LIGHT_MODEL_AMBIENT, Global_Ambient);
glLightfv(GL_LIGHT0, GL_AMBIENT, AmbientLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, DiffuseLight);
glLightfv(GL_LIGHT0, GL_SPECULAR, SpecularLight);
glLightfv(GL_LIGHT0, GL_POSITION,LightPosition);

glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION,  0.05f );
glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION,    0.03f );

glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, AmbientLight);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, DiffuseLight);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, SpecularLight);
glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, Shininess);
glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, Emission);

glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);


My render code:

glClearColor( 0.117f, 0.117f, 0.117f, 1.0f );
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glEnable(GL_LIGHTING);
glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL_EXT, GL_SEPARATE_SPECULAR_COLOR_EXT);
glColor4f(1.0, 1.0, 1.0, 0.2);
glDisable(GL_COLOR_MATERIAL);
// render geometry here
glFlush();


What is missing here?

• as I said I tried glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL_EXT, GL_SEPARATE_SPECULAR_COLOR_EXT); and also tried multipass with glBlendFunc (GL_ONE, GL_ONE) and this did not work either. – NightKn8 Apr 5 '14 at 17:42
• What do you mean by "missing"? Do you have a screenshot? Specular depends a lot on the geometry you're rendering. If it's very sparse you may not see the effect. Do you still have this problem if you render a sphere with a ton of faces? Finally, have you tried much higher specular exponents (AKA shininess)? – ggambett Apr 5 '14 at 19:10
• Here is a screenshot: link. Fig.1 shows color stage with specular ON, Fig.2 shows my problem, the specular light is ON but there is no shiny effect on the textured surface. – NightKn8 Apr 6 '14 at 9:39

OK! I got it... The problem was that my program was using old dll opengl32.dll that was located in the same folder. After removing the old dll the rendering context automatically switched to the local dll's: atioglxx.dll for AMD and nvoglv32.dll for NVidia. So basically now the glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL_EXT, GL_SEPARATE_SPECULAR_COLOR_EXT); is working as it should. Thank you for your interest.