open exr layers or arbitrary channels in photoshop cs3?

AW
Posted By
a_wilson
May 30, 2007
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896
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In photoshop cs3 help it states that OpenEXR can contain an arbitrary number of channels, and the format supports both 16‑bit and 32‑bit images.

But I am unable to save an alpha or any arbitrary channels in the .exr file format from within photoshop. Wondering if there is a workaround or if photoshop is limited to only save a flat copy without any extra channels or alphas?

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