I suspect on a GPU it will be better to use 32-bit floating point internally. But yeah, dithering the output when converting back to integers would be great. I

I suspect on a GPU it will be better to use 32-bit floating point internally. But yeah, dithering the output when converting back to integers would be great. In Photoshop I always convert to 16-bit linear color before doing any kind of compositing or resampling.