I haven't had a problem with .exrs from Terragen, but up until now have only rendered 16 bit .exrs to comp in Nuke, though I can't imagine there's any difference between those and 32 bit.
I don't have to touch anything in Terragen in the render settings or in Nuke if I'm using it at home - just render and view in Nuke with the sRGB (though I'll have a quick look tonight :-)
Is it possible you have a custom viewer / lut in Nuke? The version of Nuke I'm looking at here at work has a standard sRGB / Gamma 2.4 - that might be different enough from Terragens gamma. Or if you are at work you might be viewing under a project LUT?
Terragen has a road map for including LUTs so might be easy to synchronise in the future.
32 bit is overkill for a beauty render though , 16 bit should be more than enough, though 32 bit is definitely the best format for data render elements like depth, position, normals etc.
Matt and Oyshan if you're reading would be great to have a switch to set these renders to 32 bit exr independently of the main beauty renders.
QuoteThink of EXR files like the RAW files you get off cameras, they need processing.
Not the same thing, RAW from a camera is just that, raw data that needs de-bayering to turn it into an image. Exr's are usually a linear image with no gamma correction, they can be viewed easily and just need the correct gamma to see them in the appropriate color space.
Quoteused EXR in one of my images. I did color correction using Blender (It's the only EXR compatible program I have) I was hoping for DOF information to be included in the EXR image.
Terragen doesn't do multi-channel exrs, you can render out a depth pass using render layers -
https://www.youtube.com/watch?v=ihY_kp2rzxg