Digital Product Engineering4.5 Illustration & Photography
VOL. IV · CH. 4.5 · VISUAL DESIGN

Illustration & Photography

The imagery style a product chooses says as much about its personality as any words on the page.

DivisionVisual / Brand
DifficultyIntermediate
PrerequisitesNone
Related4.6 4.7
1 min read · 210 words

4.5.1Definition

Illustration and photography are the two primary imagery approaches products use to add visual interest, explain concepts, or humanize otherwise abstract content — custom illustration for a distinctive, ownable style; photography for authenticity and realism.

4.5.2When to Use Each

Illustration fits when…Photography fits when…
Explaining abstract concepts (empty states, onboarding)Authenticity and realism matter (testimonials, real products)
A distinctive, ownable brand style is a priorityShowing an actual physical product or space
Content needs to work across many contexts flexiblyTrust and human connection are the goal

4.5.3Common Mistakes

  • Generic stock photography that visitors recognize from countless other sites, undermining rather than building authenticity.
  • Inconsistent illustration style mixing multiple visual treatments across a product, breaking the sense of one coherent brand.
  • Decorative imagery with no communicative purpose, adding load time and visual noise without aiding comprehension.

4.5.4Best Practices

  • Commission or select imagery that's specific to the actual product/team rather than generic stock wherever budget allows.
  • Maintain one consistent illustration style guide (line weight, color palette, character proportions) if illustration is used at all.
Real-World ExampleSlack's onboarding illustrations use one consistent, distinctive style throughout the product specifically so the imagery itself becomes a recognizable part of the brand, rather than interchangeable stock-style filler.