Isometric game maps: lessons from tile engines

Colour contrast still applies to illustrations that carry meaning. A bar chart drawn as blocks needs enough contrast between the bars and the floor, and labels on the faces need the same contrast as body text. Decorative scenes have more freedom, but we still avoid pale blocks on a pale background.

Palettes for isometric work start from one hue. Pick it, then shift only the lightness for the three faces, and cool the shadow slightly towards blue. Adding a second hue for accents is fine, but keep it to small elements such as windows or buttons, or the scene starts to look like a patchwork.

Common mistakes

Custom properties make isometric CSS far easier to maintain. Instead of hard-coding sizes, we define a single unit on the scene wrapper and multiply it everywhere else. Changing the unit rescales the whole illustration, keeps the proportions intact and means a phone layout needs one media query instead of twenty.

• Sketch on triangle-grid paper first
• Build the floor before the blocks
• Add motion only after the static scene works
• Write down what you tried and dropped

Accessibility for decorative art is mostly about getting out of the way. If an illustration adds no information, hide it from assistive technology with aria-hidden on its wrapper. If it does carry meaning, such as a chart, give it a text alternative that says what the picture shows, not how it was built.

Edges and highlights

SVG is often the better choice for complex scenes. CSS cubes are fun to build and easy to animate, but a city block made of hundreds of divs is hard to change and heavy to render. We draw the static parts in SVG, keep the interactive blocks in CSS, and layer the two together.

The grid is the only rule. Everything else is a suggestion.

Jonah Berg

Readers often ask whether isometric art is still a trend or already a cliché. Our answer is that the style is a tool, like a chart type. It is excellent for explaining structure and relationships, and it is a poor choice for emotion or narrative. Used for the right job, it never really goes out of date.

Testing on real devices

Icons are the hardest isometric art to get right because there is so little room. At small sizes one of the three faces usually has to go, so we pick the two that best describe the object. A book keeps its cover and spine; a box keeps its top and front. Deciding early saves a lot of redrawing.

Shadows on the floor sell the idea that a block has weight. A blurred ellipse, skewed to match the grid and placed slightly offset from the light, is usually enough. Real shadows would change with the height of the block, and adding that detail makes towers and stairs look much more convincing.