diff --git a/thirdparty/amd-fsr2/ffx_fsr2.cpp b/thirdparty/amd-fsr2/ffx_fsr2.cpp
index 3970aa7f5b..ec571b9cd2 100644
--- a/thirdparty/amd-fsr2/ffx_fsr2.cpp
+++ b/thirdparty/amd-fsr2/ffx_fsr2.cpp
@@ -952,6 +952,8 @@ static FfxErrorCode fsr2Dispatch(FfxFsr2Context_Private* context, const FfxFsr2D
     context->constants.lumaMipDimensions[0] = uint32_t(context->constants.maxRenderSize[0] / mipDiv);
     context->constants.lumaMipDimensions[1] = uint32_t(context->constants.maxRenderSize[1] / mipDiv);
 
+    memcpy(context->constants.reprojectionMatrix, params->reprojectionMatrix, sizeof(context->constants.reprojectionMatrix));
+
     // reactive mask bias
     const int32_t threadGroupWorkRegionDim = 8;
     const int32_t dispatchSrcX = (context->constants.renderSize[0] + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
diff --git a/thirdparty/amd-fsr2/ffx_fsr2.h b/thirdparty/amd-fsr2/ffx_fsr2.h
index 2a1c74abb1..dfcd4caf35 100644
--- a/thirdparty/amd-fsr2/ffx_fsr2.h
+++ b/thirdparty/amd-fsr2/ffx_fsr2.h
@@ -146,6 +146,7 @@ typedef struct FfxFsr2DispatchDescription {
     float                       autoReactiveScale;                  ///< A value to scale the reactive mask
     float                       autoReactiveMax;                    ///< A value to clamp the reactive mask
 
+    float                       reprojectionMatrix[16];             ///< The matrix used for reprojecting pixels with invalid motion vectors by using the depth.
 } FfxFsr2DispatchDescription;
 
 /// A structure encapsulating the parameters for automatic generation of a reactive mask
diff --git a/thirdparty/amd-fsr2/ffx_fsr2_private.h b/thirdparty/amd-fsr2/ffx_fsr2_private.h
index 6b5fbc5117..8a9aec5778 100644
--- a/thirdparty/amd-fsr2/ffx_fsr2_private.h
+++ b/thirdparty/amd-fsr2/ffx_fsr2_private.h
@@ -44,6 +44,9 @@ typedef struct Fsr2Constants {
     float                       deltaTime;
     float                       dynamicResChangeFactor;
     float                       viewSpaceToMetersFactor;
+
+    float                       pad;
+    float                       reprojectionMatrix[16];
 } Fsr2Constants;
 
 struct FfxFsr2ContextDescription;
diff --git a/thirdparty/amd-fsr2/shaders/ffx_fsr2_accumulate_pass.glsl b/thirdparty/amd-fsr2/shaders/ffx_fsr2_accumulate_pass.glsl
index 31d68292d4..2e98c8a6c5 100644
--- a/thirdparty/amd-fsr2/shaders/ffx_fsr2_accumulate_pass.glsl
+++ b/thirdparty/amd-fsr2/shaders/ffx_fsr2_accumulate_pass.glsl
@@ -35,7 +35,7 @@
 #endif
 #define FSR2_BIND_SRV_INTERNAL_UPSCALED                      3
 #define FSR2_BIND_SRV_LOCK_STATUS                            4
-#define FSR2_BIND_SRV_INPUT_DEPTH_CLIP                       5
+//#define FSR2_BIND_SRV_INPUT_DEPTH_CLIP                       5
 #define FSR2_BIND_SRV_PREPARED_INPUT_COLOR                   6
 #define FSR2_BIND_SRV_LUMA_INSTABILITY                       7
 #define FSR2_BIND_SRV_LANCZOS_LUT                            8
@@ -52,6 +52,10 @@
 
 #define FSR2_BIND_CB_FSR2                                    18
 
+#if FFX_FSR2_OPTION_GODOT_DERIVE_INVALID_MOTION_VECTORS
+#define FSR2_BIND_SRV_INPUT_DEPTH                            5
+#endif
+
 #include "ffx_fsr2_callbacks_glsl.h"
 #include "ffx_fsr2_common.h"
 #include "ffx_fsr2_sample.h"
diff --git a/thirdparty/amd-fsr2/shaders/ffx_fsr2_callbacks_glsl.h b/thirdparty/amd-fsr2/shaders/ffx_fsr2_callbacks_glsl.h
index 10da13fb81..b610037cc6 100644
--- a/thirdparty/amd-fsr2/shaders/ffx_fsr2_callbacks_glsl.h
+++ b/thirdparty/amd-fsr2/shaders/ffx_fsr2_callbacks_glsl.h
@@ -52,6 +52,9 @@
 		FfxFloat32    fDeltaTime;
 		FfxFloat32    fDynamicResChangeFactor;
 		FfxFloat32    fViewSpaceToMetersFactor;
+
+		FfxFloat32    fPad;
+		mat4          mReprojectionMatrix;
 	} cbFSR2;
 #endif
 
@@ -317,7 +320,11 @@ FfxFloat32 LoadInputDepth(FfxInt32x2 iPxPos)
 #if defined(FSR2_BIND_SRV_REACTIVE_MASK) 
 FfxFloat32 LoadReactiveMask(FfxInt32x2 iPxPos)
 {
+#if FFX_FSR2_OPTION_GODOT_REACTIVE_MASK_CLAMP
+	return min(texelFetch(r_reactive_mask, FfxInt32x2(iPxPos), 0).r, 0.9f);
+#else
 	return texelFetch(r_reactive_mask, FfxInt32x2(iPxPos), 0).r;
+#endif
 }
 #endif
 
@@ -354,6 +361,16 @@ FfxFloat32x2 LoadInputMotionVector(FfxInt32x2 iPxDilatedMotionVectorPos)
 {
 	FfxFloat32x2 fSrcMotionVector = texelFetch(r_input_motion_vectors, iPxDilatedMotionVectorPos, 0).xy;
 
+#if FFX_FSR2_OPTION_GODOT_DERIVE_INVALID_MOTION_VECTORS
+	bool bInvalidMotionVector = all(lessThanEqual(fSrcMotionVector, vec2(-1.0f, -1.0f)));
+	if (bInvalidMotionVector)
+	{
+		FfxFloat32 fSrcDepth = LoadInputDepth(iPxDilatedMotionVectorPos);
+		FfxFloat32x2 fUv = (iPxDilatedMotionVectorPos + FfxFloat32(0.5)) / RenderSize();
+		fSrcMotionVector = FFX_FSR2_OPTION_GODOT_DERIVE_INVALID_MOTION_VECTORS_FUNCTION(fUv, fSrcDepth, cbFSR2.mReprojectionMatrix);
+	}
+#endif
+
 	FfxFloat32x2 fUvMotionVector = fSrcMotionVector * MotionVectorScale();
 
 #if FFX_FSR2_OPTION_JITTERED_MOTION_VECTORS
diff --git a/thirdparty/amd-fsr2/shaders/ffx_fsr2_tcr_autogen_pass.glsl b/thirdparty/amd-fsr2/shaders/ffx_fsr2_tcr_autogen_pass.glsl
index 7d6a66b8ac..5c042c332a 100644
--- a/thirdparty/amd-fsr2/shaders/ffx_fsr2_tcr_autogen_pass.glsl
+++ b/thirdparty/amd-fsr2/shaders/ffx_fsr2_tcr_autogen_pass.glsl
@@ -40,6 +40,10 @@
 #define FSR2_BIND_CB_FSR2									11
 #define FSR2_BIND_CB_REACTIVE                               12
 
+#if FFX_FSR2_OPTION_GODOT_DERIVE_INVALID_MOTION_VECTORS
+#define FSR2_BIND_SRV_INPUT_DEPTH                           13
+#endif
+
 #include "ffx_fsr2_callbacks_glsl.h"
 #include "ffx_fsr2_common.h"