VELVET VICE LTX — Live Preview Display

Some nodes are all inputs and wires and warning labels. This one is the opposite: VelvetViceLTXLivePreviewDisplay has no inputs and no outputs. It's an output node whose only job is to render the Velvet Vice LTX live-preview frame buffer in your browser. Drop it in the graph, queue a render, and the denoising clip plays in the UI.

What it's for

It's the receiving end of the pack's VelvetViceLTXNativePreviewBridge. The bridge hooks into your sampling model and produces preview frames; this node displays them. The division of labor is clean: the bridge is the producer (it sits in the model path, has inputs), this node is the sink (it just shows the buffer). If you have a bridge but no display node, the preview frames are generated and thrown away - so the Velvet Vice workflow wires the two together.

Its description is precise about the one thing that matters: it displays the dedicated preview frame buffer without participating in the render path. It's not part of the computation - it's a viewer. Nothing about the render changes whether this node is present or not; you add it for the eyes, not the math.

How it behaves

When it executes, it returns a status string ("VELVET VICE LIVE PREVIEW READY") and otherwise just sits there as the sink for the buffer streamed by the bridge. Because it's an output node with no dependencies, it's trivially safe to leave in the graph - no wires to break, no settings to get wrong, no way to misconfigure it.

Installing it

Part of VELVET VICE - LTX (velvet-vice-ltx) via ComfyUI Manager, or:

cd ComfyUI/custom_nodes
git clone https://github.com/Velvet-Vice/velvet-vice-ltx

Restart and hard-refresh with Ctrl+F5. No pip deps. The pair works only on a ComfyUI that supports the patcher-extension API the bridge uses, so keep ComfyUI current.

Gotchas

• It's not a standalone preview node. Without the Native Preview Bridge feeding the buffer, this displays nothing. The two are a set.
• "Not participating in the render path" cuts both ways. If the preview isn't showing, this node won't tell you why - check the bridge, your VAE, and ComfyUI version.
• It costs nothing to keep around. Zero inputs, zero outputs, pure viewer. There's no reason to remove it from a Velvet Vice workflow.

For a beginner, this is the node that quietly makes LTX renders fun instead of tense - you watch the scene assemble itself at 24 FPS while it generates. It's the closest thing this pack has to a free lunch, and unlike the experimental nodes in the same pack, it can't break anything.