Purescale

Purescale is a client-side performance mod that combines spatial upscaling and frame generation to increase FPS on virtually any GPU.

Render Minecraft at a lower internal resolution, then reconstruct a full-resolution image using AMD FidelityFX FSR1 (EASU + RCAS), while keeping the GUI and HUD perfectly sharp. This can significantly improve performance in GPU-heavy scenarios such as high resolutions, shaderpacks and path tracing.

Purescale also includes experimental camera-reprojection Frame Generation, allowing it to generate additional displayed frames between rendered ones. This can improve perceived smoothness even when you're CPU-bound, and works on any GPU capable of running Minecraft—no RTX, Tensor Cores or AI hardware required.

Features

• AMD FidelityFX FSR1 spatial upscaling
• Native-resolution HUD and GUI
• Camera-reprojection Frame Generation (2× / 3× / 4×)
• Works on AMD, NVIDIA and Intel GPUs
• No special hardware required
• Fully client-side

Controls

• F6 — Toggle Purescale
• F7 — Cycle quality preset
• F9 — Open settings

Settings

Configure:

• Upscaling quality
• RCAS sharpening
• Frame Generation multiplier
• Base FPS limit

Notes

• Spatial upscaling primarily improves performance when GPU-bound.
• Frame Generation is experimental. Ghosting may occur on moving entities or the player's hand.
• Frame Generation is currently not compatible with Iris shaderpacks.
• For best results with Frame Generation, set Minecraft's Max Framerate to Base FPS × Frame Generation multiplier.

Requirements

• Fabric Loader
• Fabric API