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Textured objects often show obvious repetitions, which instantly give away that the scene is computer-generated. You can use the Corona UVW Randomizer shader to quickly randomize textures on multiple objects or object parts, making the image appear more realistic.

The Corona UVW Randomizer shader allows you to apply random offset, rotation, and scaling to textures maps and shaders assigned to different objects, or even to a single object. The way it works is similar to the Corona Multi Shader. For example, you can randomize a wood texture applied to a set of planks so that each plank has a different look in the final render. You can also apply a blending effect to the randomized texture tiles, which makes them appear even more natural.

To enable the UVW randomization, plug any texture (be it a texture map or a shader) into the Corona UVW Randomizer shader input slot and then plug its output into any material property. You can then adjust the texture transformations and other options to the desired values. You can use the Corona UVW Randomizer shader with any material property, including the bump channel, RGB normal maps, and displacement.