LTX 2.5 Templates Hide a Default-On Prompt Rewriter That Can't Be Turned Off
AillexJ · reddit · 2026-08-16
Reddit user AillexJ discovered that LTX 2.5 official templates include a prompt rewriter (TextGenerateLTX2Prompt) enabled by default, which rewrites prompts before the video model sees them, causing issues with multishot, physics, and speech. The rewriter is hidden in a collapsed subgraph, and disabling it doesn't work because the external boolean overrides at serialization. Only by checking the serialized prompt and refusing to send mismatches could it be truly disabled. Once off, the model performs well: hard cuts, physics, and dialogue work; 12s duration is reliable, 20s OOMs.
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