diff --git a/BizHawk.Client.EmuHawk/DisplayManager/Filters/Scanlines.cs b/BizHawk.Client.EmuHawk/DisplayManager/Filters/Scanlines.cs
index 24d314b1ab..62f1a0da59 100644
--- a/BizHawk.Client.EmuHawk/DisplayManager/Filters/Scanlines.cs
+++ b/BizHawk.Client.EmuHawk/DisplayManager/Filters/Scanlines.cs
@@ -33,6 +33,7 @@ namespace BizHawk.Client.EmuHawk
 
 		unsafe static void RunScanlines(byte* srcPtr, int srcPitch, byte* destPtr, int dstPitch, int width, int height)
 		{
+			const int intensity = (int)((0.75f) * 256);
 			byte* srcLine = srcPtr;
 			for (int y = 0; y < height; y++)
 			{
@@ -56,13 +57,13 @@ namespace BizHawk.Client.EmuHawk
 				//second copied line (2x width, 25%)
 				for (int x = 0; x < width; x++)
 				{
-					*destPtr++ = (byte)((s[0]*3) >> 2);
-					*destPtr++ = (byte)((s[1]*3) >> 2);
-					*destPtr++ = (byte)((s[2]*3) >> 2);
+					*destPtr++ = (byte)((s[0] * intensity) >> 8);
+					*destPtr++ = (byte)((s[1] * intensity) >> 8);
+					*destPtr++ = (byte)((s[2] * intensity) >> 8);
 					*destPtr++ = s[3];
-					*destPtr++ = (byte)((s[0]*3) >> 2);
-					*destPtr++ = (byte)((s[1]*3) >> 2);
-					*destPtr++ = (byte)((s[2]*3) >> 2);
+					*destPtr++ = (byte)((s[0] * intensity) >> 8);
+					*destPtr++ = (byte)((s[1] * intensity) >> 8);
+					*destPtr++ = (byte)((s[2] * intensity) >> 8);
 					*destPtr++ = s[3];
 					s += 4;
 				}