X3 Frame Generation

- Introducing the X3 frame generation mode. LSFG 2.1 can now generate two intermediate frames, effectively tripling the framerate.

X3 has increased GPU load by approximately 1.7 times compared to X2 mode. At the same time, LSFG 2.1 Performance and LSFG 1.1 have been optimized to be 20% faster in X2 mode compared to the previous version.

It has been tested that X3 mode does not cause any additional latency compared to X2. Latency is affected by the base framerate and when the GPU is fully utilized. For the best experience in both image smoothness and latency, it is recommended to lock the game framerate at 1/3 of the monitor's refresh rate in X3 mode.

The minimum recommended base frame rate remains the same as for X2 mode at 30 FPS for 1080p and 40 FPS for 1440p, respectively.

- New behavior when the final framerate should exceed the monitor refresh rate:

Previously, LS rendered all necessary frames, some of which were later discarded when displayed on the monitor. LS will now skip rendering extra frames while accounting for correct frame pacing, so the result should be very similar to the old behavior but much more resource efficient.
While a higher base framerate is better for latency purposes, forcing LS to skip frames may not result in the best smoothness.

Given that the LS framerate will never exceed the refresh rate now, for convenience and also for identifying issues, the 'Draw FPS' option also outputs captured frames when using DXGI capture.

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