10-bit alternative to GL_SRGB_ALPHA?
We are currently using GL_SRGB8_ALPHA8 for FBO color correction but it causes significant color banding in darker scenes.
Is there a version of GL_SRGB8_ALPHA8 that has 10 bit per color channel (e.g. GL_RGB10_A2)? If not, what workarounds are there for this use case?
The attached image has been added contrast to make it more visible but it's still noticeable in the source as well.
Solution
In the end we ended up with linear 16-bit floating-point format I suspect drivers use it internally for SRGB anyway At any rate, as @mick-p noted, we're always limited to display color depth
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