The question behind the comparison
People rarely search for a comparison because they want a feature list. They search for one because a shoot is coming, money is about to be committed, and someone has asked how the team will know the shot works before the day. The honest answer depends less on which product is chosen than on which approach it belongs to, because the approaches promise different things. A drawn board promises intent. A 3D scene promises a camera. A generated frame promises a look. None of them promises all three, and a production that confuses one promise for another finds out on set.
So this page compares the approaches, not the brands. Tools inside each approach change every season; the strengths and the failure modes of the approach itself change slowly, and they are what decide whether the plan survives contact with the shoot.
Storyboard software: fast intent, no camera
Storyboard tools digitise the oldest planning document there is: a numbered sequence of drawn frames with notes. The good ones make drawing, reordering and annotating quick, let a board be timed into an animatic against scratch audio, and export something a crew already knows how to read. Their strength is speed of intent. A director can put a sequence in front of a producer the same day, and a board is the right weight of document for an early conversation — rough enough that nobody mistakes it for the finished picture.
Where it breaks is the camera. A drawing has no focal length and no floor plan, so a board can show a move no rig can make, a wide that the location cannot give, or two shots whose geography does not join. It also breaks on revision. Every change is redrawn by a person, so the cost of a board is not the first pass but the fourth, and continuity is held only by the artist's hand. Boards are the right tool when the question is what and in what order. They are the wrong tool when the question is can we actually shoot this.
3D previs: an exact camera, a slow start
Hand-built 3D previs puts the scene in a real space. Artists model the set, rig stand-in characters, animate the action and place a virtual camera with a real lens, height and path. What comes back is the frame the day will give you, and because the camera is a set of numbers it can hand a crew those numbers: how long the track, how high the crane, where the lamp goes. For a stunt, a creature, a car rig or a complex move, nothing else is as trustworthy. Continuity is exact, because the same model is in every shot.
Where it breaks is the start and the look. Before the first camera can be placed, someone has to build the world, and that fixed cost is paid in specialist hours whether the sequence is three shots or three hundred. The frames are grey or game-like by design, which is honest about what they are for but hard to show a client who needs to feel the finished film. 3D previs is the right tool for the set pieces where a wrong camera is expensive. It is too slow and too heavy to be the first thing a small team reaches for on a thirty-second spot.
Generative previs: the look at once, the shot left to chance
Generative tools produce frames and short clips from a written description or a reference image. Their strength is obvious the first time you use one: something close to finished-looking picture, in minutes, for very little. For mood, casting direction, colour and texture — the questions a board and a grey scene cannot answer — that is transformative, and it has made a convincing pitch frame available to productions that could never have afforded one.
Where it breaks is exactly where the other two are strong. The camera is described in words, not placed, so the same prompt gives a different lens and a different height on every attempt, and a director cannot ask for the reverse of the shot they just approved. Continuity is the deeper problem: a face, a coat, a prop or a room can drift from one frame to the next, and nobody notices until the sequence is cut together. And a clip is not a film. A handful of beautiful, unrelated shots can look like progress while settling nothing a crew can build from. The cost is low per frame but it recurs, because every retry of a shot that drifted is paid for again.
Side by side
| Storyboard software | 3D previs | Generative previs | |
|---|---|---|---|
| What it settles | Composition and order: what is in the frame, and what comes next. | The camera: lens, height, distance, path, and whether the move can be built. | The look: light, texture, casting and mood, at something near finished quality. |
| What it cannot settle | Time, lens and physical feasibility — a drawing has no focal length. | How the finished picture will feel; grey stand-ins do not sell a mood. | Where the camera is, and whether the same face survives the next shot. |
| Cost scales with | Frames drawn and redrawn. Cheap per frame, expensive per revision round. | Artist hours to build sets, rig characters and animate. High fixed cost, then cheap to re-shoot. | Renders. Cheap per frame, but every retry of a drifting shot is paid for again. |
| Time to a first look | Hours to days, depending on the artist's queue. | Days to weeks before the first camera can be placed. | Minutes — which is why it is tempting, and why it is easy to mistake for a plan. |
| Continuity | Held by the artist's hand, one panel at a time. | Exact — the same model is in every shot. | The weak point: a face, a coat or a room can quietly change between frames. |
When a production reaches for which
A pitch or an early treatment wants the look and the order, cheaply. Boards for the order, generated frames for the mood, and nobody should mistake either for a shooting plan.
A commercial or a music video with a fixed day wants the camera settled and the client signed. The cost of a wrong setup on the day is the whole budget line, so the shots that carry the idea need a placed camera and a look the client has approved, and the continuity between them needs to be checked before anyone travels.
A feature's set pieces want exact cameras and physical answers. That is the home ground of 3D previs and of techvis after it, and nothing about the other approaches changes that.
A series or a campaign with many deliverables wants continuity above all: the same lead, wardrobe and location across dozens of shots and several formats. This is where a tool that only generates is weakest, and where the cost of drift compounds.
Where PREVIZ sits
PREVIZ was built because the useful answer is a combination and the combination was being done by hand, across tools that did not talk to each other. It is one production in six connected studios, each owning a stage of the work and handing the next a decision rather than a file:
- Infinitum. The on-ramp: a director agent on an infinite canvas, working across the other five studios from conversation.
- Script. The intent layer — what we are making and for whom.
- Storyboard. The plan — order, beats, coverage, structure.
- Keyframe. The hero still — high-fidelity image with full continuity.
- CineForge 3D. The space — 3D scenes, props, camera blocking.
- Director. The output — animation, video, deliverable.
Mapped onto the three approaches: Script and Storyboard do the board's job — the what and the order, with a frame against every line. CineForge does the 3D job — a staged set with a camera that has a height, a lens and a target as numbers, so a shot can be repeated exactly — without asking a small team to build a world from nothing first. Keyframe and Director do the generative job — the look, then motion from an approved frame — but starting from the staged scene and the locked references rather than from a sentence.
What joins them is the part the generative approach lacks on its own. A Continuity Lock holds a face, a wardrobe, a prop and a set, attaches them to every generation in every studio, and grades every locked render against them, so drift is caught on a screen at the planning stage instead of in the edit. Rendering runs across 99 engines routed per shot behind one policy, and every frame keeps a record of how it was made. It is used today on film and advertising work. What it does not replace is the specialist 3D department on a feature's hardest set piece; it is built to get most productions to a settled plan without needing one.
Questions to ask of any previs tool
Whatever you choose, five questions separate a plan from a mood board. Can I place the camera, or only describe it? Can I get the same shot twice, and its reverse? When the lead appears in shot forty, is it provably the same person as in shot one? Does a change to one decision reach every shot made under it? And at the end, is there something a crew can shoot from — a shot list, a sequence, the numbers — or only a folder of pictures? A tool that answers yes to all five is doing previs. One that answers yes to the first question alone is doing illustration, which is valuable, and is not the same thing.