Summary
Nerdy Rodent walks through three video upscaling approaches for MiniMax H3 content inside ComfyUI: the MMH3 Ultimate Upscale nodes from PlagueKind, the Latent Upscaler 3D from LBH123, and Seed VR2 (now available in int8 format). The core workflow logic is to generate an initial video at very low resolution — as small as 0.2 megapixels — to iterate quickly on prompts, then upscale afterward to 0.8, 1.8, or even 2 megapixels rather than generating at full resolution from the start.
Each upscaler gets a detailed parameter walkthrough: Ultimate Upscale uses four steps with the linear quadratic scheduler and a D-noise of around 0.45 for the highest detail addition, but changes the source video noticeably; Latent Upscaler 3D uses the beta scheduler with two steps and D-noise of 0.4, preserving the original closely and running significantly faster; Seed VR2 sharpens without adding new detail and works best as a final pass chained after either of the other two. The video also demonstrates chaining all three together, taking a 608×352 source to a resolution exceeding MiniMax H3’s native maximum.
The tutorial follows the channel’s “rodent method” of modular, color-coded ComfyUI workflow groups and covers edge cases like video extension upscaling, frame interpolation to 48fps, and bypassing temporal and spatial split parameters when targeting higher output resolutions. All workflows are available to Patreon supporters.
📺 Source: Nerdy Rodent · Published September 13, 2026
🏷️ Format: Tutorial Demo
