diff --git a/shaders/cMotionBlur.fx b/shaders/cMotionBlur.fx
index 8c2b2b2..905cc15 100644
--- a/shaders/cMotionBlur.fx
+++ b/shaders/cMotionBlur.fx
@@ -50,7 +50,7 @@ namespace OpticalFlowLK
             ui_max = MAXIMUM; \
         > = DEFAULT;
 
-    OPTION(float, _MipBias, "slider", "Optical flow", "Optical flow mipmap bias", 0.0, 6.0, 0.0)
+    OPTION(float, _MipBias, "slider", "Optical flow", "Optical flow mipmap bias", 0.0, 6.0, 0.5)
     OPTION(float, _BlendFactor, "slider", "Optical flow", "Temporal blending factor", 0.0, 0.9, 0.2)
 
     OPTION(float, _Scale, "slider", "Main", "Blur scale", 0.0, 1.0, 0.5)
@@ -62,7 +62,7 @@ namespace OpticalFlowLK
         [Macros for resolution sizes and scaling]
     */
 
-	#define FP16_MINIMUM float((1.0 / float(1 << 14)) * (0.0 + (1.0 / 1024.0)))
+    #define FP16_MINIMUM float((1.0 / float(1 << 14)) * (0.0 + (1.0 / 1024.0)))
 
     #define RCP_HEIGHT (1.0 / BUFFER_HEIGHT)
     #define ASPECT_RATIO (BUFFER_WIDTH * RCP_HEIGHT)
@@ -357,7 +357,7 @@ namespace OpticalFlowLK
         A /= 4.0;
 
         // Determinant
-        float D = (A.x * A.y - A.z * A.z);
+        float D = (A.z * A.z - A.x * A.y);
 
         // Temporal derivative window in 4 bilinear fetches
         float T[4];
@@ -374,7 +374,7 @@ namespace OpticalFlowLK
         B += (S[3] * T[3]);
         B /= 4.0;
 
-        float2 UV = (D != 0.0) ? ((A.yx * B.xy - A.zz * B.yx) / D) + Vectors : 0.0;
+        float2 UV = (D != 0.0) ? ((A.yx * B.xy - A.zz * B.yx) / D) + (Vectors * 2.0) : 0.0;
         return UV;
     }
 
@@ -425,14 +425,17 @@ namespace OpticalFlowLK
         float FrameRate = 1e+3 / _FrameTime;
         float FrameTimeRatio = _TargetFrameRate / FrameRate;
 
-        float2 Velocity = tex2Dlod(Sample_Common_3_A, float4(TexCoord, 0.0, _MipBias)).xy;
+        float2 ScreenSize = float2(BUFFER_WIDTH, BUFFER_HEIGHT);
+        float2 ScreenCoord = TexCoord.xy * ScreenSize;
+
+        // DownsampledRatio = Texel ratio between the finest optical flow level and the buffer we're warping
+        // We need this because the velocity between the downsampled finest level is not to-scale with the current buffer
+        float2 DownsampledRatio = BUFFER_SIZE_3 / ScreenSize;
+        float2 Velocity = tex2Dlod(Sample_Common_3_A, float4(TexCoord, 0.0, _MipBias)).xy * DownsampledRatio;
 
         float2 ScaledVelocity = Velocity * _Scale;
         ScaledVelocity = (_FrameRateScaling) ?  ScaledVelocity / FrameTimeRatio : ScaledVelocity;
 
-        float2 ScreenSize = float2(BUFFER_WIDTH, BUFFER_HEIGHT);
-        float2 ScreenCoord = TexCoord.xy * ScreenSize;
-
         for(int k = 0; k < Samples; ++k)
         {
             float2 Offset = ScaledVelocity * (Noise + k);
diff --git a/shaders/cOpticalFlowLK.fx b/shaders/cOpticalFlowLK.fx
index 4a38d4e..f221135 100644
--- a/shaders/cOpticalFlowLK.fx
+++ b/shaders/cOpticalFlowLK.fx
@@ -350,7 +350,7 @@ namespace OpticalFlowLK
         A /= 4.0;
 
         // Determinant
-        float D = (A.x * A.y - A.z * A.z);
+        float D = (A.z * A.z - A.x * A.y);
 
         // Temporal derivative window in 4 bilinear fetches
         float T[4];
@@ -367,7 +367,7 @@ namespace OpticalFlowLK
         B += (S[3] * T[3]);
         B /= 4.0;
 
-        float2 UV = (D != 0.0) ? ((A.yx * B.xy - A.zz * B.yx) / D) + Vectors : 0.0;
+        float2 UV = (D != 0.0) ? ((A.yx * B.xy - A.zz * B.yx) / D) + (Vectors * 2.0) : 0.0;
         return UV;
     }
 
diff --git a/shaders/kDatamosh.fx b/shaders/kDatamosh.fx
index ea03038..35cc924 100644
--- a/shaders/kDatamosh.fx
+++ b/shaders/kDatamosh.fx
@@ -422,7 +422,7 @@ namespace Datamosh
         A /= 4.0;
 
         // Determinant
-        float D = (A.x * A.y - A.z * A.z);
+        float D = (A.z * A.z - A.x * A.y);
 
         // Temporal derivative window in 4 bilinear fetches
         float T[4];
@@ -439,7 +439,7 @@ namespace Datamosh
         B += (S[3] * T[3]);
         B /= 4.0;
 
-        float2 UV = (D != 0.0) ? ((A.yx * B.xy - A.zz * B.yx) / D) + Vectors : 0.0;
+        float2 UV = (D != 0.0) ? ((A.yx * B.xy - A.zz * B.yx) / D) + (Vectors * 2.0) : 0.0;
         return UV;
     }
 
@@ -522,7 +522,8 @@ namespace Datamosh
 
     void Datamosh_PS(in float4 Position : SV_POSITION, in float2 TexCoord : TEXCOORD0, out float4 OutputColor0 : SV_TARGET0)
     {
-        const float2 DisplacementTexel = 1.0 / float2(BUFFER_WIDTH, BUFFER_HEIGHT);
+        float2 ScreenSize = float2(BUFFER_WIDTH, BUFFER_HEIGHT);
+        const float2 DisplacementTexel = 1.0 / ScreenSize;
         const float Quality = 1.0 - _Entropy;
 
         // Random numbers
@@ -532,7 +533,10 @@ namespace Datamosh
         Random.y = RandomNoise(TexCoord.xy + Time.yx);
         Random.z = RandomNoise(TexCoord.yx - Time.xx);
 
-        float2 MotionVectors = tex2Dlod(Sample_Optical_Flow_Post, float4(TexCoord, 0.0, _MipBias)).xy;
+        // DownsampledRatio = Texel ratio between the finest optical flow level and the buffer we're warping
+        // We need this because the velocity between the downsampled finest level is not to-scale with the current buffer
+        float2 DownsampledRatio = BUFFER_SIZE_3 / ScreenSize;
+        float2 MotionVectors = tex2Dlod(Sample_Optical_Flow_Post, float4(TexCoord, 0.0, _MipBias)).xy * DownsampledRatio;
         MotionVectors *= _Scale;
 
         float4 Source = tex2D(Sample_Color, TexCoord); // Color from the original image