Free Handdrawn Squares Patterns download includes 3 tileable 256 x 256 JPEGs and .PAT file.
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Free Yellow Concrete Texture download includes 1600 x 1200 72 dpi JPEG, tileable 512 x 512 PNG swatch and .PAT file.
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Muddly Ground Collage Textures (premium file)

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Set of 13 grungy Photoshop concrete brushes.
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