diff --git a/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_common_types.h b/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_common_types.h
index ec70e52..f0b62ab 100644
--- a/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_common_types.h
+++ b/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_common_types.h
@@ -260,6 +260,29 @@ typedef int16_t     FfxInt16;
 typedef int16_t2    FfxInt16x2;
 typedef int16_t3    FfxInt16x3;
 typedef int16_t4    FfxInt16x4;
+#elif SHADER_API_PSSL
+#pragma argument(realtypes)     // Enable true 16-bit types
+
+typedef half        FfxFloat16;
+typedef half2       FfxFloat16x2;
+typedef half3       FfxFloat16x3;
+typedef half4       FfxFloat16x4;
+
+/// A typedef for an unsigned 16bit integer.
+///
+/// @ingroup GPU
+typedef ushort      FfxUInt16;
+typedef ushort2     FfxUInt16x2;
+typedef ushort3     FfxUInt16x3;
+typedef ushort4     FfxUInt16x4;
+
+/// A typedef for a signed 16bit integer.
+///
+/// @ingroup GPU
+typedef short       FfxInt16;
+typedef short2      FfxInt16x2;
+typedef short3      FfxInt16x3;
+typedef short4      FfxInt16x4;
 #else // #if FFX_HLSL_SM>=62
 typedef min16float  FfxFloat16;
 typedef min16float2 FfxFloat16x2;
@@ -334,7 +357,7 @@ typedef min16int4   FfxInt16x4;
 // #define FFX_HALF            (1)
 // #define FFX_HLSL_SM         (62)
 
-#if FFX_HALF
+#if FFX_HALF && !defined(SHADER_API_PSSL)
 
 #if FFX_HLSL_SM >= 62
 
@@ -372,7 +395,7 @@ typedef min16int4   FfxInt16x4;
 
 #if defined(FFX_GPU)
 // Common typedefs:
-#if defined(FFX_HLSL)
+#if defined(FFX_HLSL) && !defined(SHADER_API_PSSL)
 FFX_MIN16_SCALAR( FFX_MIN16_F , float );
 FFX_MIN16_VECTOR( FFX_MIN16_F2, float, 2 );
 FFX_MIN16_VECTOR( FFX_MIN16_F3, float, 3 );
@@ -446,6 +469,79 @@ typedef FfxUInt32x3     Prefix##_U3;          \
 typedef FfxUInt32x4     Prefix##_U4;
 #endif // #if defined(FFX_HLSL)
 
+#if defined(SHADER_API_PSSL)
+
+#define unorm
+#define globallycoherent
+
+#if FFX_HALF
+
+#define  FFX_MIN16_F  half
+#define  FFX_MIN16_F2 half2
+#define  FFX_MIN16_F3 half3
+#define  FFX_MIN16_F4 half4
+
+#define  FFX_MIN16_I  short
+#define  FFX_MIN16_I2 short2
+#define  FFX_MIN16_I3 short3
+#define  FFX_MIN16_I4 short4
+
+#define  FFX_MIN16_U  ushort
+#define  FFX_MIN16_U2 ushort2
+#define  FFX_MIN16_U3 ushort3
+#define  FFX_MIN16_U4 ushort4
+
+#define FFX_16BIT_F  half
+#define FFX_16BIT_F2 half2
+#define FFX_16BIT_F3 half3
+#define FFX_16BIT_F4 half4
+
+#define FFX_16BIT_I  short
+#define FFX_16BIT_I2 short2
+#define FFX_16BIT_I3 short3
+#define FFX_16BIT_I4 short4
+
+#define FFX_16BIT_U  ushort
+#define FFX_16BIT_U2 ushort2
+#define FFX_16BIT_U3 ushort3
+#define FFX_16BIT_U4 ushort4
+
+#else // FFX_HALF
+
+#define  FFX_MIN16_F  float
+#define  FFX_MIN16_F2 float2
+#define  FFX_MIN16_F3 float3
+#define  FFX_MIN16_F4 float4
+
+#define  FFX_MIN16_I  int
+#define  FFX_MIN16_I2 int2
+#define  FFX_MIN16_I3 int3
+#define  FFX_MIN16_I4 int4
+
+#define  FFX_MIN16_U  uint
+#define  FFX_MIN16_U2 uint2
+#define  FFX_MIN16_U3 uint3
+#define  FFX_MIN16_U4 uint4
+
+#define FFX_16BIT_F  float
+#define FFX_16BIT_F2 float2
+#define FFX_16BIT_F3 float3
+#define FFX_16BIT_F4 float4
+
+#define FFX_16BIT_I  int
+#define FFX_16BIT_I2 int2
+#define FFX_16BIT_I3 int3
+#define FFX_16BIT_I4 int4
+
+#define FFX_16BIT_U  uint
+#define FFX_16BIT_U2 uint2
+#define FFX_16BIT_U3 uint3
+#define FFX_16BIT_U4 uint4
+
+#endif // FFX_HALF
+
+#endif  // #if defined(SHADER_API_PSSL)
+
 #if defined(FFX_GLSL)
 
 #if FFX_HALF
diff --git a/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_fsr3upscaler_callbacks_hlsl.h b/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_fsr3upscaler_callbacks_hlsl.h
index d915cef..18f221a 100644
--- a/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_fsr3upscaler_callbacks_hlsl.h
+++ b/Assets/Resources/FSR3/shaders/fsr3upscaler/ffx_fsr3upscaler_callbacks_hlsl.h
@@ -72,6 +72,8 @@
         FfxFloat32    fDeltaTime;
         FfxFloat32    fDynamicResChangeFactor;
         FfxFloat32    fViewSpaceToMetersFactor;
+
+        FfxInt32      iDummy;
     };
 
 #define FFX_FSR3UPSCALER_CONSTANT_BUFFER_1_SIZE (sizeof(cbFSR3Upscaler) / 4)  // Number of 32-bit values. This must be kept in sync with the cbFSR3Upscaler size.
diff --git a/Assets/Resources/FSR3/shaders/fsr3upscaler/spd/ffx_spd.h b/Assets/Resources/FSR3/shaders/fsr3upscaler/spd/ffx_spd.h
index cbb3982..4082817 100644
--- a/Assets/Resources/FSR3/shaders/fsr3upscaler/spd/ffx_spd.h
+++ b/Assets/Resources/FSR3/shaders/fsr3upscaler/spd/ffx_spd.h
@@ -119,9 +119,6 @@ FfxFloat32x4 SpdReduce4(FfxFloat32x4 v0, FfxFloat32x4 v1, FfxFloat32x4 v2, FfxFl
 #endif // #if FFX_SPD_PACKED_ONLY
 
 //_____________________________________________________________/\_______________________________________________________________
-#if defined(FFX_GLSL) && !defined(FFX_SPD_NO_WAVE_OPERATIONS)
-#extension GL_KHR_shader_subgroup_quad:require
-#endif
 
 void ffxSpdWorkgroupShuffleBarrier()
 {
@@ -579,10 +576,6 @@ void SpdDownsample(FfxUInt32x2 workGroupID, FfxUInt32 localInvocationIndex, FfxU
 
 #if FFX_HALF
 
-#if defined(FFX_GLSL)
-#extension GL_EXT_shader_subgroup_extended_types_float16:require
-#endif
-
 FfxFloat16x4 SpdReduceQuadH(FfxFloat16x4 v)
 {
 #if defined(FFX_GLSL) && !defined(FFX_SPD_NO_WAVE_OPERATIONS)