virtual screens too bright

Content Creation 3D Scene Editing Post Effects Image Sequences Virtual Camera Unreal

 

Hello there,

I am using several virtual screens in a project.

Unfortunately, the screens appear much too bright, so that the color values of the original video look completely different (e.g. instead of dark blue it becomes light blue).
Can someone tell me how the brightness of the virtual screens is not affected?

In the postprocess volume settings in UE I have already selected the following:

- Infiinite extend (unbound)

- (lens/exposure) min+max brightness =1

I would be very grateful for any tips.


   thecolorzero

 
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EricWest
  -  

Hi there.

We see this a lot when connecting external sources (like a notebook e.g.) via HDMI / Decklink.

The easiest fix seems to be to linearize Gamma of the input signal in Axy (Rec709 to Lin, sRGB to Lin, ...).
The input Gamma relates to your content source.

Cheers & all the best.

Eric.


 
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thecolorzero
  -  

Hi Eric,


Thank you first of all for your support.

I have just tried this out.


The video looks a bit better after that, but unfortunately it won't be 1:1 like it should be. Since I want to show the logos of sponsors on the screen and there the exact colors should be displayed, that would be very important.

Do you think it can still be a matter of light falling on the screens?

Or did I do something wrong?


I used the following settings:

In Color Space: REC. 709 (2)

In Gamma Curve: REC 709/2020/601(3)

Out Color Space: Auto

Out Gamma Curve: Linear (and tried more)


THANKS for the support.

Best regards & I wish you a great day!


 
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EricWest
  -  

Heya. You're welcome... :-)

It's a bit tough to tell from the distance without seeing your actual footage and setup.

A shot in the blue....
Have you tried an emissive shader (i.e. it's not affected by lights at all)?

Cheers.

Eric.


 
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thecolorzero
  -  

Hi Eric,

I have tried it again based on your information.

And now it works. :)

A big thank to you.


In Color Space: sRGB (1)
In Gamma Curve: sRGB (2)
Out Color Space: sRGB (1)
Out Gamma Curve: Linear (1)

I also lowered the exposure by one stop and now it looks great.

Thanks for the tip :)

Cheers

 
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EricWest
  -  

You're welcome.

Always happy to help!