[REQUEST] Sonic Fade Shader request

[SHINGEN]

I am using the SonicFade shader by Looki which is really useful for my game but now I need a second one that fades to white rather than black. I need it to transition levels to bonus levels like in the original Sonic games.
I know this has been requested by elvisish but I don't think there was ever a solution.
Below is the code, I believe white is transparant and black isn't i wanted to swap it over but I don't know how to do it. Can someone please help me?

sampler2D Texture0;
float time;
float4 a, b;

float STEP = 1/3.0;

float4 ps_main(float2 In : TEXCOORD0) : COLOR0
{ 
	//Source color
	float4 ret = tex2D(Texture0, In);
	float3 fade = 1;

	//Step A: black to A
	if(time < STEP)
	{
		fade *= a.rgb * (time/STEP);
	}
	//Step B: A to B
	else if(time >= STEP && time <= 2*STEP)
	{
		fade = lerp(a.rgb, b.rgb, (time-STEP)/STEP);
	}
	//Step C: B to white
	else if(time < 1)
	{
		fade = 1 - (1-b)*((1-time)/STEP);
	}

	//Apply fade
	ret.rgb *= fade;
	return ret;
}

technique Shader { pass P0 { PixelShader = compile ps_2_0 ps_main(); } }

[elvisish]

Yeah, @fnkycoldmadeanr helped me with this:SonicFadeWhite.zip - it's slightly different now in that the amount is the opposite end of the time slider; I've included an example mfa that shows it flashing in and flashing out if you press F.

Unfortunately, I have no idea how to convert it to DX11, I'm afraid! Eventually I'll probably just take the SonicFade regular hlsl and fxc and just mod in the differences.

[SHINGEN]

Nice one this is exactly what Im after thanks

[elvisish]

Nice one this is exactly what Im after thanks

Did you ever port it to dx11? I haven't done it yet, and I'm not sure how easy porting shaders to dx11 is yet

[elvisish]

Thanks once again to @fnkycoldmadeanr it's ported to dx11:SonicFadeWhite.zip

[SHINGEN]

Ahh brilliant thanks a million