World Normal Buffer Values

Development Rendering
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1

I would like to get more informations related to World Normal view. In the documentation it is written this way:

World Normal shows the world space normal of any opaque surfaces.

And yes, when I get a picture from a capture scene 2d with the post process material related to the world map I get something that looks similar.

Here is now the question: What are the link between RGB values and coordinates?

I was expecting something standard like on the normal map wikipedia page.

X: -1 to +1 : Red: 0 to 255

Y: -1 to +1 : Green: 0 to 255

Z: 0 to -1 : Blue: 128 to 255

So I expected the color on the top of the cube (picture) to be: RGB(128, 128, 255) but it is RGB(186, 186, 255). So is there any documentation to get more information about it?

2

It is world space normal, so Z is from -1 to 1.

3

Yes, true, I just let intact the wikipedia quote. As worldspace it is true that Z are -1 to 1. But still the 186 value is a mysterie.
Maybe it is not using 8bit for the colors?

4

186 in sRGB is 0.5 in linear