← back to the post
previs-film · the whole process, from the human's chair

The Previs Film Flow

About 25 minutes of my time if I only make decisions; 1½–2 hours if I also paint over the references and touch the Blender file. Those two optional steps are where a film gets most of its quality. Everything else, including waiting for the GPU, runs without me: Claude queues the renders and wakes itself when they finish.

MeClaudeThe GPU (background, queued)Decisionhigh value = optional, but it moves quality the most
~25 min
my time, decisions only
~1½–2 h
my time with paint-over + previs tweaks
0 credits
local default: MiniMax-H3 on an 8 GB laptop
~10 min
GPU per 6 s clip at 736×416 (measured, 2 reference images + previs)
Me
Claude & the GPU
Pre-production

Ask for the film

One message: who's in it, the idea, the length, and "local" or "cloud". Add a reference video if I want to copy a technique.

2 min
1

Reads canon and the technique

Loads the character pages and my render notes. If I gave a video, it transcribes it and turns it into a step table.

Move panels between the two piles

Look at the storyboard. Orange panels get a Blender previs; the rest go straight to video. Swap any I disagree with.

5 min
2

Shot list + storyboard

Timed beats per shot, a rough board, and the Blender / straight-to-video split already marked.

Is this motion quicker to animate than to describe, and can it be animated well?Yes → Blender previs. No → text to video. A badly animated previs gets copied, bad motion included.

Pick and merge

Four candidates per new character, monster, prop or place. Say what I like: "hair from 2, coat from 4". Confirm any new character fact.

10 min
3

Asset sheets

New designs: 4 candidates each. Existing characters: sheets built from the canon image, never reinvented.

Paint over the picks

Lift brightness and saturation, add loose strokes around each silhouette, fix any wrong detail. Every reference ends up in one look, and the video copies the look of its references.

15–30 minhigh value
4
Skipped? Claude does an image-edit paint-over instead. It works; a hand is better.

Watch the test clips

Say what breaks: a prop drifting, the style going 3D, someone appearing who shouldn't. Each problem becomes a rule for this film.

5 min
5

Test stage

One or two short clips with every asset thrown in, before any real shot.

Do the assets hold up in motion?No → ↺ back to 3 or 4 (usually a missing prop sheet or a reference in the wrong style).
Previs

Open the .blend and nudge it

Press 0 for the camera view, then play. Drag a camera path point, retime a key, or pull the camera back where the grey shapes are hard to read. The model follows these timings.

10–20 minhigh value
6

Grey-box previs

Built in Blender from code: true proportions, squash and stretch, the camera move, handheld noise, an animated lens. Cut into one 6-second chunk per clip, with cuts on chunk boundaries.

Can you tell what every grey shape is?No → zoom out, make big things bulkier, keep the camera out of walls. ↺ 6

Proofread the prompts

Check them against canon: the right mask, the right weapon, who's in the shot.

3 min
7

Five-block prompts

Scene and style, labelled references, timed beats, locks, animation principles. Name only who is in the shot. Two reference images max on 8 GB (merge sheets side by side), previs strength 0.55.

Production
Local or cloud?Local: free, 736×416, runs in the GPU queue. Cloud: approve the credits first (H3 ~2 credits/s, Seedance ~7 credits/s at 720p).
Nothing. Leave the laptop plugged in.
8

Render in the background

One GPU lease per clip, waiting its turn behind other sessions; cached models unloaded first; a live watchdog cancels any clip past 15 minutes.

Watch the red-outline cut

The film with the Blender previs drawn in red over the generation. Name any shot that's off and what's wrong.

5–10 min
9

Contact sheets + comparisons

A 3×3 sheet per take. Side-by-side, crossfade and red-overlay videos for every previs shot.

Is the shot right?Detail wrong: screenshot the good frame, paint the detail in, re-render with it as reference 1. Framing wrong: fix the previs. A stranger appeared: fix the cast line. Background drifted: add a location reference. ↺ 8
Finish

Music and final mix

The cut arrives with sound effects only. Add music or change trims if I want.

optional
10

Cut, sound, checks

Hard cuts at 1080p, SFX only, levelled to −16 LUFS, a speech-to-text pass for stray voices, plus the red-outline version.

Confirm what's canon

Is the new sheet the "best" asset? Is the new monster canon? One word each.

2 min
11

File everything

The picture library with captions, a report with every take, character facts to their canon pages, render facts to the notes.