Draw Things: SeedVR2 upscaling setup and presets

This tutorial configures SeedVR2 as a render model in Draw Things for image upscaling. The presenter describes Draw Things as a free app for Mac, iPad and iOS that runs generative models on-device without a subscription. Although SeedVR2 is a video restoration model, this workflow uses single images.

The setup uses the basic model selector rather than the ESRGAN upscaler menu, which the presenter disables. With an image on the canvas, strength stays at 100% to prevent the original from bleeding through. The workflow needs no prompt. Both tiled decoding and tile diffusion use 1024×1024 tiles with 128 overlap. Rendering uses one step, guidance 1.0, shift 5.0 and the DPM++ 2M trailing sampler.

The presenter describes 7B and 3B versions, puts the 7B download at roughly 8.5 GB, and recommends it for devices with at least 16 GB RAM. They associate 8-bit S with M4/M5 Neural Engine use and 6-bit with M3 and earlier devices. Their suggested use of 3B on iPhones or devices below 8 GB RAM is explicitly a guess.

For a double-size render, the tutorial doubles the output dimensions and rescales the canvas to 200%. It also addresses saved presets overwriting canvas size: back up the custom config JSON, remove the preset's width and height entries, then relaunch Draw Things. On iPad, the presenter reports needing a workaround or another app to edit the JSON.