diff --git a/src/gl/system/gl_framebuffer.cpp b/src/gl/system/gl_framebuffer.cpp
index 07d8abaef..1ca2f7edd 100644
--- a/src/gl/system/gl_framebuffer.cpp
+++ b/src/gl/system/gl_framebuffer.cpp
@@ -250,8 +250,8 @@ void OpenGLFrameBuffer::DoSetGamma()
 		for (int i = 0; i < 256; i++)
 		{
 			double val = i * contrast - (contrast - 1) * 127;
-			if(gamma != 1) val = pow(val, invgamma) / norm;
 			val += bright * 128;
+			if(gamma != 1) val = pow(val, invgamma) / norm;
 
 			gammaTable[i] = gammaTable[i + 256] = gammaTable[i + 512] = (WORD)clamp<double>(val*256, 0, 0xffff);
 		}
diff --git a/wadsrc/static/shaders/glsl/present.fp b/wadsrc/static/shaders/glsl/present.fp
index 53fc007b6..4f5c7cffa 100644
--- a/wadsrc/static/shaders/glsl/present.fp
+++ b/wadsrc/static/shaders/glsl/present.fp
@@ -9,9 +9,9 @@ uniform float Brightness;
 
 vec4 ApplyGamma(vec4 c)
 {
-	vec3 val = max(c.rgb * Contrast - (Contrast - 1.0) * 0.5, vec3(0.0));
-	val = pow(val, vec3(InvGamma));
+	vec3 val = c.rgb * Contrast - (Contrast - 1.0) * 0.5;
 	val += Brightness * 0.5;
+	val = pow(val, vec3(InvGamma));
 	return vec4(val, c.a);
 }