Concrete is one of the most common surfaces in game development and architectural visualization — and one of the most demanding to get right. A convincing concrete material requires a normal map that captures the characteristic pitting and surface irregularity of cast or poured concrete, a roughness value calibrated to the finish type (raw formed concrete is significantly rougher than polished architectural concrete), and a basecolor that reflects the correct grey tone without looking washed out or artificially uniform.

An AI concrete texture generator produces all of this from a text description — basecolor, normal, roughness, metalness, and height maps simultaneously, tiled and ready to import. You describe the concrete type in words; the generator calibrates the physical properties accordingly.

Try it at grixai.com/try — free, no login required. Generate all five maps in approximately 25 seconds.

Why Concrete Is Difficult to Source

Standard concrete is available in free libraries like AmbientCG and Poly Haven. But concrete is not a single material — it varies enormously based on mix, forming method, finishing, age, and weathering state. The specific concrete variant you need for a project is often not in any free library:

Photographic libraries have a few of these. AI generation can produce all of them and any variant in between.

Prompting Guide: Concrete Types and How to Describe Them

Architectural and Brutalist Concrete

Brutalist and architectural concrete is characterized by exposed aggregate, formwork marks (the imprint of wooden boards or steel panels on the surface), and a coarse, utilitarian texture. This is the material of 1960s–70s buildings, brutalist architecture, and industrial infrastructure.

Effective prompts: "brutalist exposed concrete wall, coarse aggregate texture, grey with slight brown tint, visible formwork board marks" — "raw poured concrete, coarse surface pitting, industrial grey, pronounced surface variation" — "precast concrete panel, smooth grey surface, uniform finish, subtle aggregate variation."

For the normal map to carry the right detail: "coarse aggregate" signals heavy surface texture. "Smooth precast" signals a fine, uniform normal map. The distinction matters for how the material reads in a real-time renderer.

Weathered and Cracked Concrete

Weathered concrete ages visibly — cracks appear, moisture stains the surface, the grey lightens unevenly, and in extreme cases spalling occurs where the surface layer detaches. This is the most commonly needed concrete type for post-apocalyptic, urban decay, or realistic modern environments.

Effective prompts: "weathered concrete with deep crack network, aged grey surface, moisture staining, rough texture" — "cracked urban concrete sidewalk, dirty grey, weed growth in cracks" — "spalling concrete wall, chunks missing, exposed aggregate and rebar shadows" — "old concrete with horizontal hairline cracks, uneven grey patchy surface."

The height map for cracked concrete should show the crack geometry as depth variation — a well-trained model produces depth in the crack lines that reads correctly in a displacement shader.

Polished and Finished Concrete

Polished concrete is increasingly common in architectural visualization — interior floors, commercial spaces, high-end residential. It differs significantly from raw concrete: much lower roughness (0.2–0.45 vs 0.7–0.9 for raw), minimal surface pitting, a faint reflective quality.

Effective prompts: "polished concrete floor, smooth grey surface, slight specular sheen, fine aggregate barely visible" — "high-gloss concrete tile, near-mirror polish, warm grey tone" — "honed concrete floor, matte polished finish, light grey with subtle grain."

Roughness calibration is critical here. "Polished" should push roughness toward 0.2–0.35. "Honed" is 0.35–0.5. "Raw" is 0.65–0.85. If the generator does not hit the right range, add qualifiers: "very smooth, low roughness finish" or "rough, high roughness matte surface."

Stamped and Decorative Concrete

Stamped concrete is formed with patterned molds to resemble other materials — stone, brick, tile, wood. It is a common driveway and patio surface and appears frequently in suburban and commercial environment art.

Effective prompts: "stamped concrete patterned to resemble flagstone, grey with brown tint, geometric surface relief" — "stamped concrete brick pattern, weathered grey-brown, aged outdoor surface" — "decorative concrete with cobblestone stamp pattern, aged exterior finish."

For stamped concrete, the normal map carries most of the visual weight — the pattern relief should be clear and defined. Add "deep stamp relief, strong pattern definition" if the generator produces a flat result.

Painted and Coated Concrete

Painted concrete appears in garages, industrial interiors, parking structures, and urban exteriors. The key characteristic is the transition between the paint layer and the concrete surface where peeling occurs.

Effective prompts: "white painted concrete wall, paint peeling to reveal grey concrete below, aged interior" — "red oxide painted concrete floor, worn, scuffed surface" — "painted concrete block wall, pale blue-grey paint, slight sheen, even surface."

For the non-peeling variant, roughness is set by the paint finish (matte paint: 0.7–0.85, gloss paint: 0.2–0.4) rather than the concrete substrate.

The Five PBR Maps for Concrete

A complete concrete PBR material requires five maps, each carrying distinct physical data:

Basecolor: The concrete color — typically grey, ranging from near-white polished to near-black weathered. Concrete is a non-metal dielectric surface; metalness should be at or near 0. The basecolor reflects the mix tone and weathering state.

Normal map: Surface micro-detail — pitting, aggregate variation, crack patterns, formwork marks. Carries the visual complexity of the material surface. Must be imported as Non-Color data in Blender and processed through a Normal Map node.

Roughness map: Controls specular spread. Raw concrete: 0.7–0.9. Polished concrete: 0.2–0.45. Painted concrete: varies by paint finish. Weathered concrete: 0.75–0.9.

Metalness map: Should be at or near 0 for concrete — it is a dielectric material. Occasionally near 0.05 for concrete with fine metallic aggregate, but generally zero.

Height map: Surface elevation variation — crack geometry, aggregate relief, formwork texture. Used for displacement or parallax effects. More significant for rough concrete; minimal for polished.

Engine Import Workflow

Blender (Principled BSDF): Basecolor image texture → sRGB → Base Color. Normal map → Non-Color → Normal Map node (Strength: 1.0) → Normal input. Roughness → Non-Color → Roughness. Metalness → Non-Color → Metallic (will be very dark/near-zero for concrete). Height → Non-Color → Displacement (on Material Output, with Displacement node if using real displacement, Subdivision modifier on object).

Unity (URP Lit): Import normal map with texture type "Normal map." Basecolor to Base Map. Set metalness to 0 or import metalness map to Metallic channel. Set roughness as Smoothness source and tick "Invert" (Unity's Smoothness is the inverse of Roughness). For architectural concrete in Unity, Displacement can be approximated with a Parallax Occlusion Mapping node in Shader Graph using the height map.

Unreal Engine 5: Normal map is DirectX format by default (correct for UE). Roughness to Roughness. Metalness to Metallic (near zero for concrete). For Nanite geometry, height map can be connected to World Displacement with a multiply node for scale control.

See also: complete guides for Blender, Unreal Engine, and Unity PBR texture import.

Frequently Asked Questions

Can I generate specific concrete colors with AI? Yes. Concrete color can be specified in the prompt: "warm beige concrete," "dark charcoal concrete," "pale ivory polished concrete." The AI will target the described chromatic character. Results will vary, and multiple generations may be needed to hit a specific target tone.

How do I get visible crack detail in the normal and height maps? Add explicit crack language to the prompt: "deep crack network," "pronounced fracture lines," "heavy surface cracking." Without these qualifiers, the generator may produce intact concrete. The height map should carry the crack depth, which reads in real-time displacement and parallax.

Does AI concrete texture generation work for archviz? Yes, for most architectural visualization use cases. Polished concrete floor, exposed concrete wall, precast panel — these are all within the standard range of AI generation. For photo-matched concrete where you need to exactly replicate a specific building's material, a photographic scan is more appropriate.

What resolution do AI-generated concrete maps come out at? Grix generates at a fixed resolution suitable for standard game and archviz use. Download the maps and upscale with standard tools (Topaz, Magnific, or engine-level texture streaming) if higher resolution is needed. Pro and Max plans support larger output sizes — see grixai.com/pricing for current specs.

Can I use AI concrete textures commercially? Yes. Grix-generated textures are available for commercial use. Check the current plan terms at grixai.com/pricing. The free trial also allows commercial use of generated materials.

Where do I try this? Start at grixai.com/try — free, no login required. Type a concrete description, generate the five maps, download as a ZIP. First generation takes approximately 25 seconds.