tongshadow wrote: ↑Tue Apr 09, 2024 2:41 am
Guspaz wrote: ↑Mon Apr 08, 2024 3:35 pm
There aren't any scalers that can do 480 Hz anyway, the 1080p480 mode is not relevant for retro scaling.
The point is 1080p240hz. Can the Retrotink 4K do 4k@240hz BFI?
ZellSF wrote: ↑Mon Apr 08, 2024 8:31 am
If you think 1080p native resolution content will look identical on a 1080p screen compared to a 4K screen with integer scaling? Yeah that's just incorrect.
At the same size, there's a difference due to a native display having larger physical subpixels. But with retro content this difference is negligible, it doesnt need to be identical.
Again, the idea is to send a 1080p240hz signal to the display, so it sharp upscales that to the panel's 2160p resolution.
And because I know that even soft upscaling makes retro content 1080p look good, then with this monitor's sharp/integer it should look even better and comparable to real 4k scaling.
Any 4K240 monitor can do 1080p240. Some of them can even do integer scaling. The RT4K can output 1440p120, which the monitor can scale to 240 Hz. No matter what you do with retro content, if you're breaking it up into two scaling steps, you must use a non-integer step. 1080 / 240 = 4.5, 1080 / 480 = 2.25. So yes, you can then do an integer nearest-neighbour scale from 1080p to 2160p, but you've already compromised the image.
At the same time, 1440 / 240 = 6, 1440 / 480 = 3, so you can do a perfect integer nearest-neighbour scale. Then, yes, you must do a non-integer scale from 1440p to 2160p. But that's no different than 1080p, and this is something you can do with an RT4K on any 4K240 monitor.
You will actually get *much* sharper results doing 240 -> 1440 -> 2160 than you will doing 240 -> 1080 -> 2160. So the fact that your monitor can do 1080p240 to 2160p240 with an integer scale is not helpful.