How to convert this world normal to a flat tangent normal?

Davision3D

There is probably something obvious I'm missing but I can't figure this out.
This is the normal I rendered in UE4:

Now I tried lots of things to convert it but the flat part is never the usual 128,128,255 RGB.
Here is what I tried: Adjusting channels in Photoshop, Using bake model information with a flat plane in substance designer (World direction and world normal), Using xormal object/tangent space converter with a flat plane. I also tried it with normalizing first.

If anyone can point me in the right direction that would be great, no pun intended.

Obscura

Thats because its in range of -1,1

Apply this math:
 (your normal+1) / 2

This will put it into 0,1 range and you'll get the 128,128,255.

Davision3D

Thats it, thanks! I should have guessed that since UE4 does that with every normal in the material editor. The odd thing though is that that is what you get when you scene capture Normal to a texture which can only be in the 0-1 range. My workaround now is to make a post process material for the scene capture instead. With Scene Texture World Normal and that math.

wxhhlin

Thanks, It's helpful~and worked~!