# Concrete

## Visuele omschrijving
Urban matte material with flat slabs, stains, cracks, and desaturated value shifts.

## Pixelcluster regels
Use broad flat clusters with sparse cracks.
```text
MMMMMM
MMDMMM
DD..MM
```

## Contrast
Low-to-medium, with cracks as focal accents.

## Hue shifting
Warm gray highlight, neutral gray mid, cool purple-gray shadow.

## Highlights
Large weak highlights on slab planes.
```text
HHMMM
MMMMM
DD...
```

## Shadow behavior
Soft plane shadows; cracks are sharper.

## Outline
Dark gray-blue for tile/prop edges.

## Rim lighting
Rare; use only on foreground props.

## Ambient lighting
High ambient compared with metal.

## AA regels
AA on large slab edges only.

## Dithering regels
Sparse stain clusters allowed; no random grain.

## Veel voorkomende fouten
Bad:
```text
.....
.X.X.
..X..
```
Good:
```text
MMMMM
MMDD.
D...D
```

## QA checklist
- 50% scale herkenbaar: Ja, by flat slab mass and cracks.
- Not too noisy.
- Cracks are grouped.
- Background concrete stays low contrast.
- Edge AA is controlled.