ProEXR - How do you combine layers to get orig RGBA?

[anewhobby]

I IM'd one of my work mates and he showed me thecomp as it would be in NUKE. Just like I said above... just using ADD to combine the channels = the original render.

I am trying to do this in AE at home.

http://s489.photobucket.com/albums/rr257/NexusWarhammer/th_Clipboard-2.jpg (http://i489.photobucket.com/albums/rr257/NexusWarhammer/Clipboard-2.jpg)

[Mylenium]

Just like I said above... just using ADD to combine the channels = the original render.

You are confusing matters. Plus in Nuke is not equal to Add in AE. Plus does a normalized blend of all the colors on a per channel basis, which naturally is impossible to achieve this way in AE. In AE, you'd have to adjust the opacities and use individual per-layer blendmodes to achieve the same result.

Specular --> Add, Hard light, Pin Light
Reflections --> Add, Hard light, Pin Light, Overlay
Diffuse/ Raw/Beauty RGB --> Normal, Overlay
GI, Shadows --> Multiply

Try toying around, there is no general recipe due to the output ranges and pixel values varying from program to program. You sure will find tutorials on this for any of them. I clearly can recall ones for Lightwave and Maya, so keep digging.

Mylenium

[Blur1]

Plus in Nuke is exactly the same as Add in AE, given the same working colour space set up (linear float). So it's really just linearly adding the brightness values as you comp the pixels, with no clamping whatsoever, so 1+2 =3 then you would bring whatever overbrights you want into range using some kind of logarithmic falloff before clamping at the end of the comp tree....but that's not important to solving your problem right now.

In this case you have not used an "Add" blend node, you are just using "Normal" which is equivalent to an Over in Nuke. The other main issue in your project is that the working colour space is not set up to linear float like Nuke. So go into your project settings, switch the working space to sRGB and then check the "linearize working space" option. You will then get the comp to match what you see in Nuke...I checked that.

It's a bit hidden in AE, but you can get it to work in the same way.

HTH,:thumbsup:

Michael

[anewhobby]

The other main issue in your project is that the working colour space is not set up to linear float like Nuke. So go into your project settings, switch the working space to sRGB and then check the "linearize working space" option.

Ahhh... thanks bro. That was the problem. Once I was in RGBs/Lin workspace the ADD layer blend worked as I would have expected.

Thank you.

Also thanks for the others that took the time to reply.

[Mylenium]

Plus in Nuke is exactly the same as Add in AE, given the same working colour space set up (linear float).

Indeed? Maybe my memory is failing me. I could have sworn you always needed to explicitly select "Add" somewhere. Anyway, thanks for correcting me. Been too long since I last touched Nuke... (talks to himself): Download PLE for 5.1 to keep up to speed! ;-)

Mylenium

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