Guide
How to make a Roblox thumbnail that gets clicks
Roblox players decide in well under a second, from an image the size of a postage stamp. These are the rules that survive that constraint — written for developers who would rather ship than study design theory.
Decide what the thumbnail promises
A thumbnail is a promise about the experience. Before any art direction, write one sentence: 'you build a base and defend it', 'you race down a collapsing tower'. If the image does not show that sentence, it is decoration, not marketing.
Build around one focal point
Players see your thumbnail at roughly 150 pixels wide in the Roblox home feed. Two competing subjects become mush at that size. Choose one character, object or moment, put it slightly off-centre, and let everything else support it.
Push contrast harder than feels natural
The feed is dense and busy. A bright subject against a darker, desaturated background survives scaling; a mid-tone subject on a mid-tone background disappears. Squint at your image — if the subject stops separating, raise the contrast.
Use three to five words of text, maximum
Text on a thumbnail works when it can be read in one glance: 'NEW BOSS', 'UPDATE 5', 'FREE PET'. Use a heavy sans-serif, add a dark outline or drop shadow, and keep it clear of the corners where the Roblox interface overlaps.
Match the style to the genre
Tycoons and simulators read well with bright, saturated, slightly cartoonish art. Horror needs low key lighting and negative space. Fighting games want motion, dust and impact. Copying a style from a different genre confuses the promise.
Check it at feed size before publishing
Shrink the image to about 150 pixels wide and look at it on a phone. Anything you can no longer identify is wasted detail. This single check catches most failed thumbnails.
Change one thing at a time and compare
When click-through is disappointing, change a single variable — text, subject pose, background colour — and compare against the previous version. Changing everything at once tells you nothing about what worked.
Doing this with ATDCreate
ATDCreate turns the loop above into a conversation. Describe the thumbnail, attach up to ten reference images (your character, your logo, a screenshot), and then refine by talking: “bigger text”, “darker sky”, “move the character right”. Each reply edits the previous image instead of starting over, so you keep the composition you liked. Before publishing, the built-in analysis scores readability, contrast, focal clarity and text usage, and lists what to fix.
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Frequently asked
What size should a Roblox thumbnail be?
Game thumbnails are 16:9 and are usually produced at 1920x1080; game icons are square, commonly 512x512. Design for the small rendered size, not the size you export at.
Do thumbnails actually affect how many people play?
They affect click-through from the home and search feeds, which is the step before anyone can play at all. A better thumbnail does not fix a weak game, but a weak thumbnail hides a good one.
Should the thumbnail show real gameplay?
It should be honest about what happens in the game. Stylised and dramatised is fine and normal; showing content the player will never encounter costs you retention and reviews.
How often should I change my thumbnail?
Whenever you ship something worth announcing, and whenever click-through drops on an unchanged image. Keep the old file — you need the comparison.
Can AI generate Roblox thumbnails?
Yes — image models are good at composition, lighting and stylised characters, which is most of the work. You still direct it: you decide the promise, the focal point and the text. ATDCreate is built for exactly that loop, letting you refine an image by describing the change instead of regenerating from scratch.