Purescale

Purescale is a client-side mod that gives you more FPS through upscaling and frame generation. It runs on pretty much any GPU.

The idea is simple. It renders the game at a lower resolution and then rebuilds it back up to full res, so you keep most of the sharpness for a fraction of the cost. The HUD and menus stay at native resolution, so text and inventory icons are still crisp. You get to pick which upscaler you want, from AMD's FSR1 to my own XSSS and XAIS temporal reconstruction. It helps the most when your GPU is the bottleneck, like at high resolutions or with shaders and path tracing.

There's also frame generation. It takes two rendered frames and fills in the frames in between them, which makes motion look smoother even when your CPU can't keep up. No RTX or tensor cores needed for this part. It works on any GPU that can run Minecraft, and it plays fine with shaderpacks.

Upscalers

• XSSS (default), my recommended reconstruction
• XAIS 2 ULTRA and XAIS 1, my own temporal reconstruction
• AMD FSR1 (EASU + RCAS)
• XeSS-Style and NIS-Style
• DLAA, for anti-aliasing at native res without dropping resolution
• Sharpen Only, just RCAS sharpening and nothing else
• Nearest, Bilinear and Bicubic for the cheap simple filters

Controls

• F6 - turn Purescale on and off
• F8 - FPS and stats overlay (off by default)
• F9 - settings

Everything else, including quality, the frame gen multiplier and engine, lives in the F9 settings screen (Basic up top, Advanced folds out).

Settings

You can change the upscaler and quality (or set a custom render scale), sharpening, the frame gen multiplier, and a bunch of extra knobs like history strength, ghost reduction, motion-adaptive resolution, FXAA and frame pacing.

Notes

• Upscaling mainly helps when you're GPU-bound.
• Frame gen runs one real frame behind, so there's a little extra input latency. Fast-moving mobs can ghost a bit; the hand is protected by a depth-based guard so it shouldn't double on fast turns.