HDR and bit depth

HDR and bit depth

How many bits (Dynamic Range, f-Stops) does Octane use to render an image? It seems to suffer from the same problem described below. I want my indoor render to look like what a human eye sees, not some cheap disposable camera, HDR wise. The location where the sun shines on the floor is totally white. If I turn down the exposure, everything else becomes very dark.\

Please help.

I didn't find the right solution from the Internet.

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