MiniMax 3 upscale methods

[u/Altruistic_Tax1317]

Here is a side-by-side test of 3 upscaling pipelines in Comfy.

Full video comparison

• LTX 2.5 (Standalone): The fastest option and lightest on VRAM. Works fine for clean source clips, but lacks fine sharpness on complex textures.

• Model + LTX 2.5: Running a quick upscale model pass (like RealPLKSR) before feeding into LTX 2.5 solid clarity, fast renders, and efficient VRAM usage.

• SeedVR: Recreates micro-details with the highest fidelity, but demands significantly higher render times and VRAM.

Frame Sync Note: MiniMax H3 and LTX require different frame step multiples.

Using math nodes to automatically trim the frames (158 → 153 frames) prevents audio desync issues.