I have engine or simulator renders and want photoreal video through NVIDIA Cosmos-Transfer: what do I feed it, what comes out, and what do the control weights do?

Cosmos-Transfer1-7B (paper, Mar-Apr 2025) and Cosmos-Transfer2.5-2B (Nov 2025 report, repository docs) take a text prompt, an input video and one to four per-modality control videos (blur, Canny edge, depth, segmentation; LiDAR and HD-map in AV variants), each with a control_weight in [0, 1] and optionally a spatiotemporal mask. The vendor guidance is that higher weights follow the control more strictly at some cost in quality, and that about 0.5 is a middle starting point. Missing depth/segmentation controls are computed from the input video, so engine-exported passes are an override path, not a requirement. Curator qualifications: All excerpts located. Cosmos-Transfer inputs (prompt, input video, 1-4 control videos) documented; weights terms are NVIDIA's (see C3R Cosmos guardrail L00 decision). Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary. Limitations: [component_reuse_restriction] NVIDIA Open Model License terms per earlier Cosmos reviews; no new rights reading. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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