Problem with SceneTexture color output

vvvv gamma question
1

I would like to modify a texture color grading using a RGBA color over a quad, so If R G B A = 1 , no modification is made to the texture, and I expect the same RGB values / resolution / format

colorshif.vl (25.3 KB)

But I realized I can not get the exact same texture as input

image
image781×1028 69.2 KB

I also try changing format… what I am doing wrong ?

2

just guessing but there is a Enable Default Post Effects pin on that node. it might be the tone mapping that is applied.

3

@tgd thanks! That settting and render stage AfterScene was missing

image
image761×926 105 KB

But I am confused with the math now… if my original image is 8bit per chanel, the float32 out from pipet * 8 shoud give number without decimals ?