Materials and texture
- ai images
- materials
A material word tells the model what something is made of; the finish, the wear and the moment decide how it looks. Most weak prompts stop at the material — and the render fills in everything else with the most generic version it knows. Surfaces are where general prompts fail quietly. Skins, fabric, wood, metal: everyone has handled these materials, which means everyone notices when a render gets them wrong. Precision here buys more realism than any other slot.
Four questions for any surface
How it works, step by step
- What is it made of? Name the material the way a supplier would: oak, full-grain leather, brushed steel, linen, glazed ceramic.
- How is it finished? Matte, satin or glossy; oiled, painted or raw; brushed or polished. The finish decides how light leaves the surface.
- What condition is it in? Showroom-new, worn-in, weathered, sun-faded, cracked — wear is free storytelling.
- What state is it in right now? Dry, wet, dusty, oily, steaming. State words change the render more than most people expect.
- How does light meet it? Texture becomes visible when light rakes across a surface — pair the material words with a side light and the grain appears.
A bad example
Ask: “A luxurious wooden table.”
“Luxurious” is a price tag, not a property. The model picks a generic wood with a generic finish — and nothing in the result is debuggable.
A better example
Ask: “A thick oak table with an oiled finish, soft sheen, visible grain and gently worn edges; warm side light from the left.”
Every word is a property: species, finish, condition, light. Change one — matt lacquer instead of oil — and the render changes predictably.
Why it works
Materials are physical claims, and generative systems render physical claims literally: brushed steel scatters light differently from polished steel because those are different surfaces, not different adjectives. Two extra words — oiled, worn — are often the difference between leather that renders like plastic and leather that looks photographed. The four questions are separable — so debugging a surface is a matter of restating the one answer that went wrong. And because texture only shows under directional light, this lesson stacks on the lighting fundamentals: material words describe, light reveals.
Practice
Fix the material prompt
A furniture studio wants an editorial photo of its leather sofa. The brief was written in a hurry and has produced two generic renders in a row — the leather looks plastic and none of the wear the studio loves is visible.
Rewrite the prompt so the sofa's material, finish, condition and state each give the model something specific to render.
The weak prompt
a photo of a leather sofa in a nice living room, very premium quality, looks expensive
A strong version (self-assessment — not machine-graded)
An editorial photo of a three-seat sofa in cognac leather with an oiled matte finish, a soft sheen along the cushions and gentle worn creases on the arms and seat; a quiet living room with warm afternoon side light raking across the leather from the left.
Hint
Replace every judgement with a property: “expensive” becomes a finish, “nice” becomes a material.
Texture hides in flat light — add one clause about how the light meets the surface.
Why this is the answer
The weak prompt describes a price and a feeling; the fixed one describes a surface. Cognac, oiled, matte, worn creases: each answer narrows what the renderer can supply, and each is separable — so when the leather looks too new, you adjust one clause instead of the whole brief. Materials reward precision more than any other slot, because everyone recognises how a real surface should age.
Transfer
- Products: finish words carry perceived quality — matte and satin read premium, gloss reads plastic.
- Interiors: condition words set the story — worn oak and faded linen say “lived in”, pristine surfaces say “showroom”.
- Fabrics: name the weave and drape (chunky knit, crisp cotton, fluid silk), not just the fibre.
- Debugging: when a surface looks wrong, ask which of the four questions went unanswered.
Key takeaways
- Material + finish + condition + state: four answers, one believable surface.
- “Luxurious” and “quality” are prices, not properties — they render nothing.
- Texture is revealed by light, not requested by adjectives.
Next
Next: Text inside images — what lettering current models really can and cannot do. The generative AI entry and the diffusion entry cover the machinery behind every render.