Dynamic tone mapping on or off?

[StartWars]

I recently bought an LG CX and was wondering what are people's thoughts about dynamic tone mapping when watching movies and TV? Do you keep it on or off?

I can't make up my mind which I prefer. Sometimes the image looks too dim with it switched off but I understand having it on can result in a loss of detail and make picture look less natural? Should I also leave it on or off when playing games on a PS5 or switch to HGIG?

 

[StartWars]

Can having dynamic tone mapping on cause a loss in detail?

 

[StartWars]

I should mention I'm using it predominantly for 4K blurays or streaming services that don't use Dolby Vision.

For HDR content I use Filmmaker mode with OLED Light set to 100, Contrast set to 100, and Brightness set to 50. With dynamic tone mapping disabled the image looks duller or is it more accurate?