Hi,

I have a question about MRT.

Let's say i have a shader with MRT output, something like this:

struct PixelOutput
{
	float4 color0 : COLOR0;
	float4 color1 : COLOR1;
};

PixelOutput pixelShader(Input in)
{
	float4 color = 1.0;
	
	PixelOutput output;
	output.color0 = color;
	output.color1 = color;
	return output;
}

But what if i just have only one RenderTarget is active? What the GPU would do when it couldn't find enough RenderTargets as it should have?

Basically nothing… it will only write to the targets that are available…the other output goes nowhere. AFAIK…

Yeah, the DirectX 11 will emit a ‘safe’ warning about it, at the same time, it will discard the other output(s). (mjp)