The phrase "intricate patterns" refers to complex or detailed designs or arrangements that could be difficult to understand or replicate easily. Full definition
With intricate patterns that often resemble lace, this lightweight vintage style adds detail to any outfit. (meijerstyle.com)
If you look really closely at the skirt, there's a cute little intricate pattern on the skirt, front and back. (thebeautybeau.com)
Another difficulty, however, arises from interpreting natural variations, such as the effect of varying light levels and intricate patterns made by highly textured objects such as grids and trees. (scientificamerican.com)