A Filmmaker's Guide to DI and VFX

Directors and producers supervise post by setting creative priorities, assigning work, and protecting the budget and schedule. Artists and technical specialists recommend and implement the workflow.

On a low-budget film, one person can hold many jobs. Keep responsibilities distinct even when a few people wear many hats.

Assign, document, and test the work

Give each technical decision to a qualified specialist. Require a written plan and a representative test before production or work begins.

What the Filmmakers Decide

Creative intent: look, tone, composition, visual motifs, and how VFX will support the story
Priorities: which work is essential, what can be simplified, and where the limited budget can be spent
Authority: who gives final creative approval, who can give delegated notes, and who can 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, sequence, or scene achieves the intended goal

Technical specialists recommend workflow details such as codecs, formats, color management, and delivery specifications. The director approves the creative result, not the implementation alone.

What Technical Specialists Decide

The responsible department heads recommend and document:

Decision	Responsible specialist	Filmmaker's responsibility
Camera recording format and monitoring workflow	Cinematographer, DIT, colorist, VFX supervisor	After the team completes a VFX test, approve the creative result and budget
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	Require each vendor to complete a round-trip test
Conform and editorial interchange	Editor, assistant editor, finishing editor	Schedule turnover and editorial conform checks
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, post supervisor	Supply the current recipient specification and require QC
Archive formats, manifests, and restore process	DI, post supervisor, archive vendor	Fund it, retain access, and name the parties responsible for long-term maintenance

Delegation still requires oversight. Ask specialists to explain how each recommendation affects image quality, flexibility, schedule, cost, and delivery risk.

Questions to Ask Every Vendor

A clear bid identifies responsibilities, expectations, review, approval, delivery, and change-order boundaries. Ask the same core questions of every vendor so expectations are aligned before the work begins.

Ask before work begins

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 creative revisions are included in the bid, and what constitutes a change-order overage?
How will we review work, give notes, and record approval?
What full-quality files, assets, projects, manifests, and documentation will we receive?
Which assets and elements are proprietary to the vendor studio, and which are property of production?
What does another vendor need to aid or continue the work in your absence?

Communication

Email gives production and vendors a record of decisions that both parties can retain. Business communication, file-transfer notices, authorizations, bids, and approvals belong in writing, preferably by email. Text messages and conversations are useful for creative discussion, but their conclusions need to reach everyone responsible for acting on them.

A production-controlled email alias can distribute messages to the people who need them without requiring every vendor to maintain a separate recipient list. Production controls the membership, so a departing collaborator can be removed without changing the address vendors use. Removing a recipient stops future distribution. It does not recall messages or files already received.

Keep decisions and recipients in writing

Have the producer or post supervisor give each vendor a list of people to CC on creative and business communications. Use separate lists when business details require narrower access.
Set up a production-controlled email alias for each agreed recipient group. Check that all intended recipients are included.
After a call, meeting, or text exchange, email the conclusion, agreed action, and responsible person. Ask the other party to confirm any decision that changes scope, cost, schedule, or approval.
Send files through the agreed transfer service. Email the delivery link or receipt with the contents, revision, recipient, and purpose of the transfer.
Keep bids, authorizations, change approvals, and final sign-offs in the production email record. Retain the vendor's confirmations.
Update alias membership and the vendor's CC instructions when someone leaves the project or no longer needs the correspondence.

Control Who Can Move the Film

Every vendor needs the names of the legal owner, custodian, and people authorized to request copies or release assets.

These are separate roles. A crew member must not automatically have authority to download masters or collect physical assets. The same restriction applies to LTO transfers, cloud data, and deletion requests.

Authorize every release of production assets

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

A distributor, financier, or buyer can later require a formal lab access letter. See Lab Access Letters and Asset Authorization.

Working with VFX

Before Photography

VFX planning affects the script, schedule, sets, lenses, and coverage. The VFX supervisor needs to join the relevant discussions with the director and cinematographer while those choices can still change.

Plan and bid VFX before photography

Decide what production must photograph and what VFX can build. List the reference and data the artists need. Ask for bids that state assumptions, included revisions, schedule, required inputs, final outputs, and change-order rates. If a vendor offers a flat-rate bid without contingencies or conditions, require a written list of what the price includes and excludes. Ask what limits apply to the vendor's commitment if the schedule extends or the scope expands.

During Photography

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 the planned VFX material

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

During Reviews

A useful note identifies the version, frame, visible problem, and intended result. It gives the artist enough context to act without prescribing an unnecessary technique.

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. Do not count technical failures against 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 low-budget film, the DI can be a single colorist. A larger team can include a DI producer, project manager, conform editor, finishing editor, and mastering technician. It can also include color and imaging science specialists and engineers. Mastering may or may not be assigned to another vendor.

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

Small effects handled during conform or finishing are often called opticals. See Opticals List for the historical meaning, common examples, and the boundary between DI opticals and separately assigned VFX shots.

DI Turnover

Before final color grading and finishing can begin, the DI must receive an editorial turnover. It includes a locked cut or a work-in-progress cut of the film, original media assets, and editorial instructions.

Not everything has to arrive at once. Titles, graphics, credits, and the final mix often arrive later. Temporary versions can help the DI judge timing, framing, and continuity. Picture editorial uses its judgment, in consultation with the DI, to prepare turnovers that support useful work now and identify what will follow.

For example, a sequence containing only green-screen plates, with no temp or final VFX, may offer little substantive grading work. The DI would need to online the original media and conform the sequence, then wait for the composites. Editorial and the DI can prioritize more complete sequences unless an early conform is needed for a test or other defined task.

Prepare the DI turnover

Have picture editorial send the finishing facility:

the locked or clearly versioned cut
a reference movie
the original media assets and camera-original inventory
the intended VFX versions and their approval state
titles, graphics, credits, or labeled temps with expected delivery dates
color references
framing instructions
known deliverables

Before the session begins, ask the facility to identify missing materials. Record:

who performs the conform and who checks it against editorial
who attends the grade and who can send notes
what projectors or reference displays are being used
the required masters
how late VFX or editorial changes affect cost and schedule
what project files, three preservation masters, LUTs, EDLs, and documentation will be archived

Conform Review

The conform is the onlined, final-quality assembly of the film. It is what will be graded and eventually mastered for distribution. Careful review establishes that the assembly represents the filmmaker's creative intention and is technically sound, including its source media, timing, framing, effects, and image processing.

Verify the conform throughout the DI

Have the editor or assistant editor compare it with the offline reference. Review every cut, speed change, resize, reposition, title, composite, and intended VFX version. Have the finishing team correct technical reconstruction errors. Verify the conform at multiple stages throughout the DI and before any test screening or deliverable creation.

Color Review

The director and cinematographer communicate the emotional and photographic intent. The colorist translates that intent into a consistent finished image and advises when a request cannot be reasonably accomplished due to the nature of the material.

Judge the grade in sequence and on a reference display

Give notes in terms of the image and the story. Review continuity in sequence, not only attractive individual shots. Make final judgments on a calibrated reference display, ideally the same one your colorist is using, not from a compressed review link or an uncalibrated laptop.

Final Approval

Final approval identifies the cut, grade, VFX, titles, and mix that production has signed off. The approved work becomes the basis for mastering, but creative approval does not replace technical QC of the exported files. A replacement shot, title, or mix after sign-off needs its own review before it can replace the approved material.

Review the complete program before approval

Have the DI and QC reviewer check the complete film for dropped, missing, corrupt, or incorrect frames.
Confirm that final VFX, titles, framing, and color are present.
Check that picture and sound remain in sync.
Have the DI confirm that the intended picture and sound masters were rendered and checked.
Have the producer confirm delivery of the agreed textless elements, stems, projects, manifests, and archival material.

Record who approved each master and which file represents that approval. List any outstanding corrections and withhold delivery authorization until they are resolved and checked.

When You Are Also the Technical Specialist

Low-budget filmmakers often perform editorial, VFX, color, or mastering themselves.

Separate each technical responsibility

Define the workflow and specifications before beginning any work.
Test a representative round trip.
After you change roles, review the result.
If the schedule permits, review the result again 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

A small production does not need studio infrastructure. It does need named responsibilities, tested procedures, traceable approvals, full-quality review, and well-organized and archived project material.

Meet the minimum standard

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 Production Guide explains how specialists execute these responsibilities. Use the advanced technical chapters to evaluate a specific recommendation.