Sony picture profiles

[anton_foy]

Going to buy the Sony A7 IV with internal 10-bit 4:2:2 recording in UHD and has prior to this used the Sony A6300 in slog2. Has anybody here had any experience of shooting in slog3/HLG3 or any other modes to get a good dynamic range yet low noise level? Many report that slog3 has alot of noise and low detail retention especially in low light situations.

I have made LUTs for slog2 that I want to use in post so I would like to stick to one profile if possible but otherwise I will have to compromise. Also how can slog3 in zebra mode keep from clipping above 100%? Many (including Sony) recommend overexposing up to 2 stops but I cannot wrap my head around this. If zebra is set to 100% then if above its clipping and no info above 100% will be?
I mean 0-1024?

[wswartzendruber]

What is HLG3?

[anton_foy]

What is HLG3?

HLG3 is sony's latest "hybrid-log-gamma"-picture profile for shooting video which has a bit different distribution than the SLog profiles. Some tests have shown that HLG3 has a better highlight rolloff curve than SLog and even DR (according to the test charts, I will try to find this link) but I am sceptical to this.
I plan to shoot in 10-bit 4:2:2 (up to-)600mbps and I want to get the best DR possible while keeping the noise low. It is possible that I need one profile for low light and another for mid to bright scenes maybe I do not know yet.