Maestro v1.6.5 - MiniMax H3 Fixes & Improvements!

v1.6.5 (2026-08-08)

MiniMax H3 performance and lower-VRAM support

• H3 Turbo now works with the recommended Pruned 20B models as well as the optional Full 33B models.
• Turbo now starts at six steps and LoRA strength 0.50, while keeping the LoRA visible and adjustable in Advanced settings.
• Reworked H3 model residency, activation chunking, and VRAM budgeting to reduce step-zero out-of-memory failures and excessive CPU offloading.
• Added resolution- and GPU-aware First / Last window recommendations, with clear warnings and a manual override for experimental combinations.
• Added an optional experimental First Block Cache for faster H3 generations, with selectable quality/speed thresholds.

H3 resolutions and long-video planning

• Added a faster model-aligned 720p tier using 1280x704 landscape output and matching portrait, square, and 4:3 canvases.
• Restored 1080p H3 generation with an experimental note and hardware-aware shorter-window recommendations.
• Hid the less efficient 768p preset from the main selector while retaining compatibility with existing saved settings and API requests.
• Added automatic H3 sliding-window storyboarding: one idea is expanded into a complete, editable prompt for every continuation window.
• Actions, dialogue, camera coverage, sound effects, ambience, and music are distributed across the timeline instead of being completed and repeated in the first window.
• Each exact window prompt is visible during generation in its own full-height editor, with the active window highlighted and no nested scrollbars.

Director H3 workflow improvements

• Director now uses the same H3 resolution, VRAM, and native-frame rules as Studio when planning shot lengths and execution profiles.
• Long scenes are divided before generation to fit the selected model, resolution, GPU, and Turbo configuration instead of being silently shortened at runtime.
• Added H3 Turbo controls and adjustable per-LoRA strengths directly to Director mode.
• Improved independent-shot context so recurring characters, wardrobe, locations, blocking, dialogue, and sound remain self-contained across prompt-only H3 shots.

MiniMax LoRA discovery and compatibility

• Added a MiniMax H3 filter to the CivitAI browser and routed downloaded H3 LoRAs into the correct shared H3 folder.
• Pasted Hugging Face MiniMax H3 LoRA URLs now use the same correct destination instead of defaulting to LTX.
• Added automatic H3 LoRA architecture conversion where required so compatible adapters can run on both Pruned and Full checkpoints.
• Added early validation, pinned support assets, and clearer recommendations for combinations that may exceed available VRAM.