dagthomas/comfyui_dagthomas/h3-base-format

H3 base format (T2VA / I2VA / FL2VA / L2VA)

This is what the APNext H3 Prompt Writer and APNext H3 Claude Code Writer nodes expect back. The node splits the text on these three labels, so they must appear exactly once, in this order, each followed by one blank line:

integrated_multimodal_description: [Shot 1] <style>, <one continuous timeline> ...
 
overall_soundscape: ...
 
non_diegetic_music: ...

The stated visual style opens [Shot 1] (the node names it, or asks you to choose one).

Alignment lines

T2VA begins directly with integrated_multimodal_description:. The other modes put one alignment line first, then exactly one blank line, then the three fields. Copy the wording character for character; only N (the number of the final shot) and S.SS (the duration, two decimals) change.

I2VA: For the target video, at 0.00 seconds into the target video, <Picture 1> (from [Shot 1]) is fully referenced.

FL2VA: How the reference pictures align with the target video — Picture 1 (from Shot 1) aligns with the 0.00-second mark of the target video; Picture 2 (from Shot N) aligns with the S.SS-second mark of the target video.

L2VA: How the reference pictures align with the target video — <Picture 1> (from [Shot N]) aligns with the S.SS-second mark of the target video.

The node's own directive repeats the right line for the chosen task type; if it and this file ever differ, follow the node.

How the node's images map

The node sends whatever was connected to its image socket as an ordered batch and hands the same frames back out as first_frame and last_frame for the video node:

• I2VA - the image is <Picture 1>, the exact opening frame. Preserve its identity,

clothing, colours, key objects and geography, then develop forward from it.

• L2VA - the image is <Picture 1>, the exact final frame, and belongs to the last

shot. Infer a plausible earlier state, then a transition path, then a gradual convergence, then land on the image.

• FL2VA - frame 0 of the batch is <Picture 1> (opening), the last frame is

<Picture 2> (ending). Describe the change between them and land exactly on the ending.

• T2VA with an image attached - the image is visual context to describe from, not a

keyframe. No alignment line, no <Picture N> labels.

Describe what you actually see in the frames: subject, wardrobe, colour, light direction, objects, spatial layout. Do not paraphrase the user's idea back when the picture already answers the question.

Reference library