Render Resolution and File Formats: What Each Use Needs

Resolution is the number of pixels in an image, and a render has to carry enough pixels for the size at which it is seen. Too few and the image looks soft in print. Too many and it is heavy for no benefit. The right number depends on the physical size, the viewing distance and the medium.

Format is the way the pixels are stored. Some formats compress hard and suit the web. Others keep every detail and suit print and editing. A good brief names both for every use.

A 4K render for print suits brochures and standees. For large formats, confirm the image size for hoarding with your printer first and send us the final dimensions.

4K refers to an image about four thousand pixels wide, the size of modern high-definition screens. A 4K render looks sharp on a large display and is a comfortable size for most web and many print uses. It is a sensible default for stills and films that will be seen on screens.

We deliver 4K, print and web formats. The print format is set to the size and resolution the printed piece needs, and the web format is light enough to load quickly. Naming each use at the start tells the studio which to prepare.

Print resolution depends on how close the viewer is. A brochure is held in the hand and needs fine detail. A hoarding is seen from tens of metres and does not need the same density, but it does need a large file.

A render is composed for a shape. A hoarding is tall, a website banner is wide, a social post is square or vertical. Cropping a wide render to a tall hoarding loses half of it, and a render composed for a hoarding looks odd on a banner.

List every shape you need. The studio can compose the main camera for the most important one and add crops or alternate cameras for the rest. It is better to plan the shapes than to discover them at the printer.

Screens and printers show colour differently. A render that looks right on a monitor can look dull in print. For print-critical work, ask for a print-ready file in the right colour space and request a proof from the printer before the full run.

Brand colours need particular care. Send swatches or references, and check the proof against them. A small shift in a brand blue is noticed immediately by the people who know the brand.

Take an illustrative launch (a made-up shape, not a real client). The hero image is needed as a hoarding, a brochure cover, a website banner and a social post.

The team lists the shapes and sizes: a tall hoarding, an A4 cover, a wide banner and a square post. The studio composes the main camera for the hoarding, which is the largest, and checks it against the others. Alternate crops are planned for the banner and the post. It delivers a print file for the hoarding and the cover, a 4K file for screens and light web files for the site and social.

No render has to be redone at the printer.

Still images are the simplest case. Films, tours and panoramas each have their own technical settings, and the studio chooses them for the platform. A film is compressed to a size that plays smoothly on the intended screens. A tour is built from large panoramas that are optimised for loading on a phone. A panorama for a headset needs more resolution than one for a phone.

The brief should name where each will play. A film for a website, a film for a launch screen and a film for a reel are three different files, even though they share footage. A tour for phones and a tour for a gallery screen may use different panorama sizes.

A set of final files is only useful if people can find the right one. Agree a naming convention before delivery: project, view, use, size and version. A folder structure that mirrors the channels, such as print, web, social and screens, saves a great deal of time later.

Ask for a delivery list that names every file and its intended use. When the files arrive, check them against the list. Mistakes caught at handover cost minutes, and those caught at the printer cost days.

Images have long lives. A hero render may appear on a hoarding now, in a brochure next month and in a resale listing in a few years. Ask for a high-quality master that can be resized for later uses, and keep it in a safe place. A master saves a re-render, and a re-render takes time you may not have.

Larger images take longer to render and are heavier to store and send. A hoarding-size file can be many times the weight of a web file, which matters when files travel by email or are uploaded to portals. Ask the studio to deliver the heavy master through a transfer link, and to supply light web copies for everyday use. Resolution should serve the use, not exceed it, and the master should be kept for later needs.