There are 6 balls with materials in the scene

For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of materials is configured with PBR in mind

You may have been looking for:
plaster texture, dented texture, uneven surface material, natural material, gray stone, putty, pattern, gray paint, brown, coffee shade, cream, light stone, gypsum plaster, gypsum surface, seamless texture 4k