Turns still images into cinematic motion-controlled videos instantly.Who it's for: creators who want this pipeline in ComfyUI without assembling nodes from scratch. Not for: one-click results with zero tuning - you still choose inputs, prompts, and settings.<h3 id="open-preloaded-workflow-on-runcomfy">Open preloaded workflow on RunComfy</h3><a target="_blank" rel="ugc" href="https://www.runcomfy.com/comfyui-workflows/ltx-2-3-sulphur-2-prompt-relay-workflow-in-comfyui-image2video-motion-control?utm_source=civitai&amp;utm_medium=referral">Open preloaded workflow on RunComfy (browser)</a>Why RunComfy first - Fewer missing-node surprises - run the graph in a managed environment before you mirror it locally. - Quick GPU tryout - useful if your local VRAM or install time is the bottleneck. - Matches the published JSON - the zip follows the same runnable workflow you can open on RunComfy.When downloading for local ComfyUI makes sense - you want full control over models on disk, batch scripting, or offline runs.How to use (local ComfyUI) 1. Load inputs (images/video/audio) in the marked loader nodes. 2. Set prompts, resolution, and seeds; start with a short test run. 3. Export from the Save / Write nodes shown in the graph.Expectations - First run may pull large weights; cloud runs may require a free RunComfy account.<hr /><h3 id="overview">Overview</h3>This setup helps you turn static images into cinematic video clips enhanced by motion-aware prompts. It combines LTX 2.3 video generation with Sulphur 2 motion control for smoother transitions and lifelike camera moves. With segmented prompt sequencing, you can define micro-actions for each moment. It supports realistic lighting, expressive movement, and scene continuity. The system provides an efficient path to transform images into professional-level cinematic storytelling sequences.Important nodes:<h2 id="key-nodes-in-comfyui-ltx-2.3-sulphur-2-prompt-relay-workflow">Key nodes in Comfyui LTX 2.3 Sulphur 2 Prompt Relay workflow</h2><ul><li><code>PromptRelaySmartEncode</code> (#610)</li><li>Purpose: Translates your beat‑by‑beat “smart prompt” into properly timed text conditioning for the whole clip. Use <code>global_prompt</code> for unchanging details (style, subject, lighting) and <code>smart_prompt</code> for the action sequence. Two authoring styles are supported: inline segments separated by <code>|</code> with optional proportional tags like <code>[0-50]</code>, or block headers like “Scene 1:” that weight segments by range. Keep one syntax per prompt to avoid ambiguity. Reference: <a target="_blank" rel="ugc" href="https://github.com/kijai/ComfyUI-PromptRelay">ComfyUI‑PromptRelay</a>.</li><li><code>LTXVImgToVideoInplaceKJ</code> (#617)</li><li>Purpose: Locks the first frame’s look and gently propagates it through motion. If identity or wardrobe drifts, raise its image adherence; if motion seems constrained, lower it to allow more dynamics. Balance this with your Sulphur 2 LoRA strength so the reference remains stable without over‑freezing motion.</li><li><code>LoraLoaderModelOnly</code> (#628) — Sulphur 2 motion LoRA</li><li>Purpose: Injects the Sulphur 2 fine‑tune to bias motion continuity, trajectory smoothness, and action staging. Increase <code>strength_model</code> to emphasize guided movement across segments; reduce it if you see over‑constraint or repeated patterns. Adjust in tandem with <code>ImgToVideoInplace</code> strength to keep subject fidelity and motion energy in harmony.</li><li><code>LTXVConditioning</code> (#164)</li><li>Purpose: Consolidates positive/negative conditioning for LTX‑2.3 and sets the clip’s frame rate. If you lengthen the shot, revisit your Prompt Relay segment weights so the relative timing still matches the intended beats.</li><li><code>SamplerCustom</code> (#561)</li><li>Purpose: Runs the denoising pass using your chosen sampler and schedule. If motion is jittery, try a slightly smoother schedule or a sampler known for temporal stability; if prompts under‑steer, modestly raise guidance while watching for over‑saturation. Use <code>VisualizeSigmasKJ</code> to sanity‑check the schedule’s shape before long runs.</li></ul><h3 id="notes">Notes</h3>LTX 2.3 Sulphur 2 Prompt Relay Workflow in ComfyUI | Image2Video Motion Control - see <a target="_blank" rel="ugc" href="https://www.runcomfy.com/comfyui-workflows/ltx-2-3-sulphur-2-prompt-relay-workflow-in-comfyui-image2video-motion-control?utm_source=civitai&amp;utm_medium=referral">RunComfy page</a> for the latest node requirements.

LTX 2.3 Sulphur 2 Prompt Relay Workflow in ComfyUI | Image2Video Motion Control

Initial release - LTX-2.3-Sulphur-2-Prompt-Relay.

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