A Filmmaker's Guide to DI and VFX

You do not need to be a colorist, compositor, conform editor, or mastering technician to supervise post-production well. You need to make the creative and production decisions that steer the project, hire or assign qualified people for the technical decisions, and document and test those choices.

On a small film, one person may hold several jobs. Keep the responsibilities distinct even when the names are the same.

What the Filmmakers Decide

The filmmakers own decisions about:

Creative intent: look, tone, framing, aspect ratio, visual continuity, and how VFX supports the story
Priorities: which work is essential, what can be simplified, and where a limited budget should be spent
Authority: who gives final creative approval, who may give delegated notes, and who may approve added cost
Schedule: when the cut, turnovers, reviews, mix, color, mastering, QC, and exhibition must happen
Destinations: whether the film is being prepared for festivals, theatrical exhibition, streaming, broadcast, sale, or only a private screening
Approval: whether a shot, grade, mix, title, and master express the intended result

The director is not expected to decide codecs, compression methods, color pipeline, delivery specifications, or workflow specifics without a recommendation from the person responsible for that work.

What Technical Specialists Decide

The responsible department heads recommend and document:

Decision	Normal owner	Filmmaker's responsibility
Camera recording mode and exposure workflow	DP, DIT, colorist, VFX supervisor	Confirm it supports the intended look and budget, is adequate for planned VFX work
Color-management architecture and transforms	Colorist, DI, VFX supervisor	Require a written proposal and round-trip test
VFX plate and final-render specification	VFX supervisor with DI or colorist	Confirm vendors received and tested it
Conform and editorial interchange	Editor, assistant editor, finishing editor	Schedule turnover and approve the conformed cut
Sound session format, stems, and mix deliverables	Supervising sound editor and mixer	Define exhibition priorities and approve the mix
DCP, IMF, HDR, and platform packaging	DI or mastering specialist	Supply the current recipient specification and require QC
Archive formats, manifests, and restore process	DI, post supervisor, archive vendor	Fund it, retain access, and assign a long-term owner

Do not confuse delegation with surrendering oversight. A specialist should explain the practical consequence of a recommendation in terms of image quality, flexibility, schedule, cost, or delivery risk.

Questions to Ask Every Vendor

Before work begins, ask:

What exactly are you responsible for?
What do you need from production, in what format, and by what date?
What decisions or tests must be completed before you begin?
What is included in the bid, and what creates a change order?
How will we review work, give notes, and record approval?
What full-quality files, projects, manifests, and documentation will we receive?
What would another vendor need to continue the work?

A confident answer that is not written down is not a workflow.

Control Who Can Move the Film

Before sending media or project data to a vendor, name the legal owner, the custodian, and the people authorized to request copies or release assets. These are separate roles. A person working on the film is not automatically authorized to download masters, collect drives, transfer LTO tapes, move cloud data, or direct a vendor to delete anything.

Give each facility a written authorization record. State who may view, duplicate, receive, transfer, or delete each class of asset. Require the facility to verify new destinations and log every outgoing transfer. Update the record when personnel or vendors change.

A distributor, financier, or buyer may later require a formal lab access letter. See Lab Access Letters and Asset Authorization and use the Lab Access and Asset Authorization Letter as a starting point.

Working with VFX

Before Photography

Identify VFX while the script, schedule, sets, lenses, and coverage can still change. Bring the VFX supervisor into the relevant conversations with the director and DP. Decide what must be photographed, what can be built, and what reference or data the artists will need.

Ask for bids that state assumptions, included revisions, schedule, required inputs, final outputs, and change-order rates. A low total with undefined scope is not a reliable budget.

If a vendor provides a flat-rate bid without contingencies, revisions, or conditions, ask what the price includes and excludes. Do not assume the vendor understands the full scope.

During Photography

The director decides the performance and storytelling. The director and cinematographer define the desired image. The VFX supervisor identifies conditions that will make the intended result difficult, expensive, or impossible and proposes solutions that preserve the creative intent.

Capture clean plates, lens and camera data, lighting and texture reference, measurements, and any elements required by the plan. Do not assume an artist can reconstruct information that production chose not to record.

During Reviews

Review the current version against the editorial context. State what is wrong on screen and what the shot should accomplish. Avoid prescribing a technical method unless that method is itself a creative requirement.

Useful note:

At frame 1048, the reflection reveals the crew. Remove the reflection while preserving the movement and brightness of the window.

Less useful note:

Fix the comp.

Separate creative revisions from technical corrections. “Make the creature feel more threatening” changes the creative target. A color-space error, missing frame, broken matte, or incorrect version is a technical failure and should not consume the creative revision allowance.

Working with the DI

What “the DI” Means

In this handbook, the DI is shorthand for the company, facility, team, or individual handling digital-intermediate picture finishing. On a small film, the DI may be one colorist. A larger team may include a DI producer or project manager, conform and finishing editors, in-house optical or lite-VFX artists, color-science and pipeline specialists, and mastering technicians. Mastering may also be assigned to another vendor.

The colorist is part of the DI, but the terms are not interchangeable. Ask who owns each function. One person may fill several roles.

Before the Booking

Send the finishing facility the locked or clearly versioned cut, reference movie, camera-original inventory, approved VFX list, titles, color references, framing instructions, and known deliverables. Ask the facility to state what is missing before the session begins.

Confirm:

who performs and approves the conform
who attends the grade and who may send notes
the target displays and required masters
how late VFX or editorial changes affect cost and schedule
what project files, graded and ungraded masters, LUTs, EDLs, and documentation will be archived

Conform Review

The conform is the rebuilt film, not the creative grade. Compare it with the offline reference and check every cut, speed change, resize, reposition, title, composite, and approved VFX version.

The editor or assistant editor should attend or review the conform. The director approves that it is the intended cut. The finishing team corrects technical reconstruction errors.

Approve the conform before using paid color time to discover editorial problems.

Color Review

The director and DP communicate the emotional and photographic intent. The colorist translates that intent into a consistent finished image and advises when a request conflicts with the photographed material, VFX, display, or schedule.

Give notes in terms of the image and the story:

“Keep her face harder to read until she crosses the doorway.”
“The exterior should feel colder than the apartment, but not blue.”
“The VFX shot feels cleaner and sharper than the photography around it.”

Review continuity in sequence, not only attractive individual shots. Make final judgments on the calibrated target display, not from a compressed review link or an uncalibrated laptop.

Final Approval

Approval means more than liking the last scene shown in the room. Confirm:

the complete film plays without dropped, missing, corrupt, or incorrect frames
final VFX, titles, framing, and color are present
picture and sound remain in sync
the intended picture and sound masters were rendered
textless elements, stems, projects, manifests, and archival material were delivered

Record who approved each master and which file represents that approval.

When You Are Also the Technical Specialist

Microbudget filmmakers often perform editorial, VFX, color, or mastering themselves. Treat each job as a separate responsibility:

Write the specification before starting the work.
Test a representative round trip.
Review the result after changing roles and, when possible, on another day.
Bring in a consultant for pre-production, active post, and delivery.
Use an independent reviewer for the final master.

Doing the work yourself reduces labor cost. It does not remove the need for specifications, validation, or fresh eyes.

The Minimum Standard

At minimum:

assign every responsibility
test every important handoff
keep one source of truth for versions and approvals
review final work at full quality
retain enough material to move the project or rebuild it later

The rest of this handbook explains how the specialists execute those responsibilities. Use the Production Guide to supervise the work and the advanced technical chapters when you need to evaluate a specific recommendation.