How to improve a render with AI

Published 2026-08-27

The render is finished. The lighting works, the materials are the ones you specified, the camera is exactly where you wanted it. And it still reads as a render.

That last step, the one between a correct image and one that looks like a photograph, is post-production. Done by hand. It costs hours per image, and those hours are almost never in the budget.

CoconutFlow does it in minutes. You upload your render, make two decisions and download it.

Living room of a house: the original render on the left, the processed version on the right — **This is the step.** On the left, a render: flat upholstery, a rug with no weave, the landscape blown out beyond the window. On the right, the same scene with fabric, grain in the wood and an outside you can actually look at. *Click any image in this article to enlarge it and compare with the slider.*

This guide covers those two decisions and what you get in each type of scene. Every example is a real project put through the tool.

What it does, exactly

It takes an image that already exists and gives it the finish. It doesn't generate scenes from scratch and it doesn't redesign the layout: your project stays your project, with your composition, your materials and your lighting.

There is no prompt to write. Nothing to learn about phrasing instructions, no hunting for the wording that finally works. Upload the image, pick a resolution and a mode, and the system reads the scene and sets the treatment on its own.

It works the same on photographs. If the project is already built and you have images of the space, they go in through the same door.

Mode: you decide how close it stays to the original

This is the decision that matters, and it's the one that puts you in control.

Almost any tool that runs AI over an image reinterprets it. The result looks striking, and sometimes it hands you back a room you didn't design. Here that's your call, on a button, before you process.

Mode	What it does with fine detail
Conservative	Respects it. A repeating pattern — a tufted headboard, a lattice screen, a patterned fabric — comes back as it was, element by element.
Balanced	Refines it. Gains texture and definition while keeping the design recognisable. It's the middle ground and it's the default.
Creative	Pushes further. Redraws fine detail freely to get the strongest possible image.

All three give you a better image than the one you uploaded. What changes is how much freedom you hand over on decisions you had already made yourself.

Which one to use

Balanced for almost everything. It's the default and it's right the vast majority of the time. Always start here.

Conservative when fidelity rules: the client already signed off on that render, there's a specified material in the spec, the image goes into a technical document, or there's signage that has to read exactly the same. It guarantees that what comes out is what went in, better finished.

Creative when the image is there to sell: a cover, a social post, a competition board. Impact matters more than literalness, and the result shows it.

Switching mode is one click, and you can run the same image through all three to compare.

Output resolution

The second decision is about size, not character. It runs from ORIGINAL, which keeps your image's exact dimensions, up to 10K.

Resolution	Cost	Average time
1K	1 Coconut	—
2K	3	3 min 17 s
3K	5	3 min
4K	8	4 min 18 s
8K	10	~8 min
10K	16	~8 min
ORIGINAL	by size	3 min 41 s

Times measured in production, on real working images.

Pick by where the image ends up. For screen — web, social, a projected presentation — 2K is more than enough. For a printed dossier or a competition board, 4K. And if you only want the finish without changing the size, ORIGINAL: it's the most used option, alongside 4K.

8K and 10K are for large format: a banner, site hoarding, a board people will study up close. That's where every pixel earns its place; on screen you won't tell them from a 4K.

Upload whatever you have. The tool takes up to 4096 px on the long edge and, if your render is larger, it resizes it for you before processing. No image gets turned away for being too big.

What you get in each type of scene

The system rebuilds fine detail instead of just sharpening pixels. That's why it doesn't behave like a sharpening filter: where the render had a smooth surface, material appears.

Vegetation

This is where it shows most, and you don't need a garden for it — a single planter will do. Plants in a render have that repeated perfection no real plant has: cloned leaves, one flat shade of green, no shadow between them. The system separates them one by one, gives them highlight and volume, and breaks up the uniformity.

Café with trailing ivy in hanging planters and a bouquet of flowers, before and after processing — **Look at the trailing ivy and the bouquet.** On the left the leaves are flat cut-outs in a single green. On the right every leaf has its own shadow and highlight, and the flowers on the counter go from blocks of colour to actual blooms.

In Creative, greenery picks up a force that's hard to build by hand, indoors and out. If the project has specified planting the client will recognise, Conservative keeps it plant by plant.

Fabric and upholstery

They gain enormously. The weave appears, the padding takes on volume, folds stop being flat planes of colour.

Bedroom with throw and rug, before and after: the textiles gain fold and weave — **Fabric stops being a flat colour.** The throw takes on weight and folds, the knitted one gains its fringe, the rug gains pile. It's the difference between a drawn textile and one you feel you could touch.

If the upholstery is a specified material rather than set dressing, Conservative gives you back the same pattern with the texture improved.

Wood, stone and ceramic

The best ground of all. Grain, figure and pore are exactly the kind of detail a render flattens and the system rebuilds naturally.

Living and dining room with wooden floor, cabinet and wall panel, before and after — **Wood goes back to being wood.** The floor, the cabinet and the wall panel recover grain and warmth, and they're still the material you chose. Oak stays oak.

Balanced is enough here. Fidelity to the material holds without dialling anything down.

Glass, metal and reflections

Concrete and glass house over water, before and after — **Glass, concrete and water.** All three gain definition and the reflection turns believable. The sky gains cloud and depth too: a render exterior stops looking like a backdrop.

Reflective surfaces are where a photographic finish pays off most, because a flat reflection gives a render away instantly. If the glazed façade is the subject of the image, Conservative keeps the reflection tied to the original.

People and pets

A lived-in scene works just as well. The people in the living room, the dog on the sofa and the washing on the terrace get the same finish as the architecture, and the image gains something a render rarely conveys: that somebody actually lives there.

Night and low-light scenes

This is where the jump is biggest, because noise and lack of definition are exactly what the system resolves. The worse the light you start from, the more spectacular the result.

House with a pool at dusk, before and after: light and sky change completely — **The biggest jump in the whole guide.** The dusk, the light spilling from inside and the entire garden arrive with a force the render never had. A flat evening becomes the cover image of the project.

For a cover or a campaign, leave it on Creative and enjoy it. If the image goes into a planning submission and the sky has to match the real orientation of the plot, use Conservative.

Not just renders: photographs too

Everything above applies to a photo. Same place, same process, same modes.

Photographed living room, before and after processing — **This isn't a render, it's a photograph.** It gains definition, colour and light through the same process. Useful for the portfolio, for social, and for showing the before and after of a refurbishment.

Where it shows most is in phone shots under ordinary indoor light: dark rooms, windows blown out to white, flat colour. They come out publishable without going near a retoucher.

If photographs rather than renders are your work, there's a whole guide for that: how to improve interior photos with AI.

What comes with every image

Your original, untouched. The image you started from is kept as it is, and you can download it any time from your history, next to the result and with a comparison slider to see both.

The result with no loss. There's no recompression on our side. What you download is exactly what came out of the process, ready to print.

No monthly fee. You buy Coconuts and spend them when you need them. They don't expire: whatever is left over from this project is still there for the next one, six months from now or whenever.

Several images at once. You don't have to wait for one to finish before starting the next, and you can close the tab: the work carries on and it's waiting for you when you come back.

Start on Balanced and ORIGINAL. It's the cheapest run and in a couple of minutes you see exactly what the system does with your image.
Look at it at 100 %, not as a thumbnail. Check what matters in the project: the material you specified, the planting, the signage.
Want more impact? Creative. Want it more literal? Conservative.
With the mode settled, run it again at the resolution you need. Mode doesn't change with size, so you get the same result at the size you actually need.

That order saves Coconuts: you test cheap, you decide, and only then do you pay for the large resolution.

And if a version doesn't quite land, run it again. Every pass is a fresh interpretation, so you get a second proposal for the price of one image.

Try it with one of your own renders. The first Coconuts are on us.

Start at coconutflow.app