Light Shafts + Tone Mapping?

float4 PS_mdGRMask(float4 vpos : SV_Position, float2 texcoord : TEXCOORD) : SV_Target
{
	float4 color = tex2D(RFX_backbufferColor, texcoord);
	float depth = tex2D(RFX_depthColor,texcoord).r;
	if (depth == 1 && (color.r+color.g+color.b)/3 > GR_Bright) return color;
	return float4(0,0,0,0);
}

float4 PS_mdGRBlur(float4 vpos : SV_Position, float2 texcoord : TEXCOORD) : SV_Target
{
	float4 color = tex2D(RFX_backbufferColor, texcoord);
	float4 mask = tex2D(SamplerMask, texcoord);
	float4 output = float4(0,0,0,0);
	float  count = 0;
	float2 lightXY = float2(0.5,0.0);
	float angle = 0;
	float2 vect;
	for (int c=0;c<=GR_Size;c+=GR_Skip) {
		if (texcoord.x >= 0.5) angle = atan( abs(texcoord.y - lightXY.y)/abs(texcoord.x - lightXY.x)  ); //droite
		else angle = PI-atan( abs(texcoord.y - lightXY.y) / abs(texcoord.x - lightXY.x) ); // gauche
		vect = float2( -c*cos(angle)*PIXSIZE.x, -c*sin(angle)*PIXSIZE.y);
		count ++;// 1-tex2D(RFX_depthTexColor, texcoord.xy + vect.xy).r;
		output += tex2D(SamplerMask, texcoord.xy + vect.xy );//*(1-tex2D(RFX_depthTexColor, texcoord.xy + vect.xy).r);	
	}
	return color + (output/count)*GR_Alpha;
}

technique Custom_Tech <bool enabled = RFX_Start_Enabled; int toggle = Custom_ToggleKey; >
{
	pass mdGRMask
	{
		VertexShader = RFX_VS_PostProcess;
		PixelShader = PS_mdGRMask;
		RenderTarget = texMask;
	}
	pass mdGRBlur
	{
		VertexShader = RFX_VS_PostProcess;
		PixelShader = PS_mdGRBlur;
	}
}

#define RENDERMODE RGBA8
#define PIXSIZE  	float2(BUFFER_RCP_WIDTH, BUFFER_RCP_HEIGHT)
//textures

texture   texMask 	{ Width = BUFFER_WIDTH/2; Height = BUFFER_HEIGHT/2; MipLevels = 8; Format = RENDERMODE;};
texture   texGR 	{ Width = BUFFER_WIDTH/4; Height = BUFFER_HEIGHT/4; MipLevels = 8; Format = RENDERMODE;};


sampler2D SamplerMask
{
	Texture = texMask;
	MinFilter = LINEAR;
	MagFilter = LINEAR;
	MipFilter = LINEAR;
	AddressU = Clamp;
	AddressV = Clamp;
};

sampler2D SamplerGR
{
	Texture = texGR;
	MinFilter = LINEAR;
	MagFilter = LINEAR;
	MipFilter = LINEAR;
	AddressU = Clamp;
	AddressV = Clamp;
};
int br(float4 color) {
	return (color.r+color.b+color.g)/3;
}

void PS_Init(float4 vpos : SV_Position, float2 texcoord : TEXCOORD, out float4 hdrT : SV_Target0) 
{
	hdrT = tex2D(RFX_originalColor, texcoord.xy);
}

technique Init_Tech  < enabled = true; >
{
	pass Init_Mask
	{
		VertexShader = RFX_VS_PostProcess;
		PixelShader = PS_Init;
		RenderTarget = texMask;
	}

}