Stride - Grayscale Node

[vincent.now]

Hello

I am struggling to understand the “Grayscale” Node in Stride. There is a help patch for that, but it’s not really clear to me how that works. Look at the image below:

The outcome of the grayscale node is a red image? Why? I am a bit puzzled… How can i fix that?

thanks a lot!

[joreg]

indeed it could be discussed whether this is the right output. the reason you see red, is because the output is a single channel texture. and those happen to be visualised as a single red channel. for drawing gray in an rgb color system you need three channels, all with the same values.

If you rightclick->Configure->Show Output Format then you can set the format to a 4channel format (ie including alpha) and you’ll see gray.

[tonfilm]

@vincent.now

The outcome of the grayscale node is a red image? Why?

yes, grayscale images are usually stored in a single channel texture to not waste 3 additional channels with the same data, and since we have RGBA, the first channel is red. that is just something you have to know when working with 3d graphics APIs.

[vincent.now]

That makes sense. All clear now, thanks!