GLSL and nVidia issue

[Pentium166]

Well, the title says almost all.

I'm using shader to simulate bumpmapping and lightmap, it worked ok in my ATI card, but when I tried to run it in nVidia cards, it crashed. I even tried in a IGFX and it worked.
first I thought it was an application error, but then when I "propousitadely" make a mistake which will make the shader not compile (consequently, not used), and them, no crash.

Now the tricky part:
There is other models which shader works. That model already uses the bumpmap, but no lightmap. and it worked. So I thought it was a lightmap issue, so I deactivated it and tried again, and then I still got the problem! And it only happens in nVidia.

Vertex Shader:

uniform sampler2D mainTexture;
uniform sampler2D normalTexture;
uniform sampler2D lightTexture;
varying vec3 normal;
 
void main()
{
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_TexCoord[1] = gl_MultiTexCoord2;
 
 
normal = normalize(gl_NormalMatrix * gl_Normal);
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
 
}

*ps: before I was using gl_TexCoord[2] = gl_MultiTexCoord2; but some one told me to never do that. I don't understand why, in any case, I got the same error.

frag shader:

uniform sampler2D mainTexture;
uniform sampler2D normalTexture;
uniform sampler2D lightTexture;
varying vec3 normal;
 
void main()
{
vec3 normalMap = normalize(texture2D(normalTexture, gl_TexCoord[0].st).rgb * 2.0 - 1.0);
vec4 base = vec4(texture2D(mainTexture, gl_TexCoord[0].st).rgb,1.0);
vec4 lightMap = vec4(texture2D(lightTexture, gl_TexCoord[1].st).rgb,1.0);
float BaseNormal = max(dot(reflect(-vec3(0.5,1.0,0.5),normalMap),normalMap),0.0);
 
vec3 finalColor = base.xyz*lightMap.xyz;
finalColor *= BaseNormal;
 
 
gl_FragColor = vec4(finalColor,1.0);
}

well, that's it, any ideia or tests for me to do?

Regards,

[thokra]

What GLSL compiler errors do you get? Any GL errors?

[Pentium166]

no errors, the application crash in nVidia cards, the same shader runs nice on ATI and IGFX cards...

[Pentium166]

Any Ideias?