Everytime I turn on Shaders..

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Greek2me:
This happens to me, or at least used to. I think our graphics cards are not quite supported.

Bolt the thunderhog:
Thanks,I'll Try to get a new one if that is the problem.

Subpixel:
I used to have intel integrated, this would happen on minimum. It's a video card problem.

Bolt the thunderhog:
Thanks guys. You really helped me.

Port:
It's a problem regarding the way shadows are handled for particles. This bug seems to happen a lot when doing quick modifications to shaders - I have no idea why.
They're even handled differently in the shader code:

--- Code: --- // Apply lighting and fog.
vec4 fragColor = vec4(0.0f, 0.0f, 0.0f, 0.0f);
if(isParticle == 1)
{
vec4 texAlbedo = texture2D(tex, texCoord);

fragColor = texAlbedo * gl_Color;
fragColor.a = texAlbedo.a * gl_Color.a;

vec4 dirLightDirect = (dirLightColor * occlusionFactor) + (dirLightAmbient * occlusionFactor) + (dirShadowColor * (1.0f - occlusionFactor));
vec4 plt = accumulateParticlePointLights();

vec4 lightTotal = dirLightDirect + plt;
lightTotal.x = clamp(lightTotal.x, 0.0f, 1.2f);
lightTotal.y = clamp(lightTotal.y, 0.0f, 1.2f);
lightTotal.z = clamp(lightTotal.z, 0.0f, 1.2f);

fragColor = texAlbedo * gl_Color * lightTotal;

applyFog(fragColor);
fragColor.a = texAlbedo.a * gl_Color.a;

}
else
{
applyLighting(fragColor, albedo, occlusionFactor);
applyFog(fragColor);
}

--- End code ---

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