Chromatic Aberration MotionBlur

#include "ReShade.fxh" 

uniform float3 f3ShutterSpeed <
	ui_label = "Shutter Speed";
	ui_type = "drag";
	ui_min = 0.1;
	ui_max = 100.0;
	ui_step = 0.1;
> = float3(1.0, 1.0, 1.0);

uniform float fFrameTime <source = "frametime";>;

sampler2D sBackBuffer {
	Texture = ReShade::BackBufferTex;
	SRGBTexture = true;
	MinFilter = POINT;
	MagFilter = POINT;
	MipFilter = POINT;
};

texture2D tChromaticMotion_Last {
	Width = BUFFER_WIDTH;
	Height = BUFFER_HEIGHT;
};
sampler2D sLast {
	Texture = tChromaticMotion_Last;
	MinFilter = POINT;
	MagFilter = POINT;
	MipFilter = POINT;
};

float4 PS_Blend(
	float4 position : SV_POSITION,
	float2 uv       : TEXCOORD
) : SV_TARGET {
	float3 curr = tex2D(sBackBuffer, uv).rgb;
	float3 last = tex2D(sLast, uv).rgb;

	float d = fFrameTime * 0.001;
	curr = lerp(last, curr, d / f3ShutterSpeed);
	
	return float4(curr, 1.0);
}

float4 PS_Save(
	float4 position : SV_POSITION,
	float2 uv       : TEXCOORD
) : SV_TARGET {
	return tex2D(sBackBuffer, uv);
}

technique ChromaticMotion {
	pass Blend {
		VertexShader = PostProcessVS;
		PixelShader = PS_Blend;
		SRGBWriteEnable = true;
	}
	pass Save {
		VertexShader = PostProcessVS;
		PixelShader = PS_Save;
		RenderTarget = tChromaticMotion_Last;
	} 
}