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Sergey Sharybin 53bd58993e Fix T84167: Saving half-float EXR might result in NaN pixels ...

Clamp value to the -HALF_MAX .. HALF_MAX.

The non-clamped values were causing NaN and inf values saved to
the file, which was the root cause of glare node giving unexpected
result.

The nan/inf on overflow is something mentioned in the half data
type in OpenEXR header.

Differential Revision: https://developer.blender.org/D10105

2021-01-14 14:54:08 +01:00

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