Minimax H3 Workflow Hack: RTX Upscaler Before Save Cuts Render Time 40% With Better Quality

robertwellesley · reddit · 2026-09-17

A detailed walkthrough of an optimized Minimax H3 Singularity video workflow: inserting an RTX upscaler right before saving in step 2 reduces H3 Latent upscaling load, cutting 0.5mp-to-1080p HDR render time by 40%+ while improving detail. Includes tested parameters (0.5mp input, 8/12 sigma-scheduler steps, r34l1sm LoRA, ProRes 4444 12-bit, relight trick for 8-bit sources).

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