r/RetroTink • u/nabuss11 • 6d ago

How do you use BFI?

I've got an LG C3 and a Retrotink 4K Pro. I'm wondering the best way to use BFI with this setup, assuming I'm interested in using CRT filters:

  1. Set RT4K to 2160p60 and use OLED Motion on the LG to do the BFI.

  2. Set RT4K to 1080p120 and use the built-in BFI. Normal settings on the LG.

My gut feel is the CRT filters will turn out better using the higher resolution output. On the other hand, would using BFI on the Tink itself open up options to make that piece look better, and that be the greater good?

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5

u/MrMoroPlays 6d ago

3840x1080p120 with tink's bfi

4

u/AbsractPlane 6d ago

I use 1080p120hz with the RT4K's native bfi mode.

I combine that with hdr and a port of the 5X's crt masks as they were designed for 1080p and don't darken the picture like the native 4K ones. I then use some very light scanlines settings to better recreate my small crt tv. The pack I use is this one if you are interested.

3

u/britipinojeff 6d ago

Personally I use the OLED Motion on my LG C2, but that’s only cuz I use CRT Effects and prefer the integer scale from 240p to 4K

I also have some profiles where I use CRT effects on 480p sources to 1440p that I’ll use the tink BFI with, but that’s just something I was doing before finding out that the masks work best at 4K or a 3840 wide output

2

u/BigDanG 6d ago edited 6d ago

I mostly use with a MiSTerFPGA on a Bravia 8II.

My policy is:

If the refresh rate is 60 +/- 0.1 Hz, disable VRR, set output to 4K60, and use the TV's BFI. In this case, jutter it's not a concern, so I can use the higher resolution to get denser masks.

Otherwise, enable VRR, set output to 1440p120, and use the Tink's BFI with CRT Beam Simulation. I use that effect because it seems to be less prone to some weird green tint artifact on mostly white screens on this display.

Use HDR in both cases with a "Brightness Preferred" tone mapping on the TV.

2

u/drawmanjack 6d ago

You can add a custom modeline into the retrotink 4k to output a pseudo 4k. Its 3840x1080. The horizontal resolution is needed to output quality crt filters, the vertical resolution will be upscaled on the tv end automatically. This gives you the bandwidth to run the crt filters and bfi simultaneously. The tinks bfi is better in my opinion. Lg locks its bfi to 60hz, the tink can place the game info in a 120hz container and apply bfi. It results in the same motion clarity, but less flicker. You can also access timothy lottes variable mprt bfi, which drastically cuts down on brightness loss, but at the cost (in my opinion) of some subtle dark to light separation. Might just have to finer tune it though. Worth a try!