Error When Reading Two .exr Files

[user_deleted]

Hi

     I am importing two diffrent .exr files, each one are almost packed to their maximum channels available ...

now i know that both aren't corrupted because when i read them in different scripts everything is correct , i can see alle channles, but when they are both in the same script, the second one that i import gives me an error text on the node

is the 64 channles for the entire script or for each node ?

and if it is for the entire script, how can i get around this with multiple cg elements that all have multiple passes ?

THANKS

[user_deleted]

Channels in Nuke are script wide, meaning when you create a layer and channel it is available throughout the script.

If you import an EXR image which contains 40 channels and then import another EXR image that has 40 channels but each named differently then the first EXR image Nuke will not have enough channels available for the script.

The work around for your solution is to follow a naming convention that all your EXR images will follow for naming channels.

An example would be naming all your AO passes - AO.red, AO.green, and AO.blue.

If instead you were to name each channel differently in each EXR file.

Example:
Image 1: Sphere.AO.red, Sphere.AO.green, Sphere.AO.blue
Image 2: Torus.AO.red, Torus.AO.green, Torus.AO.blue

You would quickly run out of available channels inside Nuke after importing only a few images.

[user_deleted]

ok, i gety it .....

             but strategically, let's say that i have diffrent passes depending on the object...  if it is a set, props or anim .....   how would you dela with it?  by calling passes that are present in every .exr their real name, and all those who aren't in every file a generic name, like :  PASS\_01 , PASS\_02 and so on ?

[thedott]

You've got to think about your naming convention carefully when doing this. For instance, if one pass has all your 'color' information, but another pass has all your lighting contributions, you can call their layer's the same. for instance, 'diffuse' could be one layer in your lighting exr for diffuse light. While in your color exr, 'diffuse' can be diffuse color. It's suprising how many can actually share names, and still be understandable.

Barry Berman
3Dmation Visual Effects