厨房食材案板上紫洋葱商业照片

C4D render, ray tracing, high resolution. A purple onion with shiny, papery gradient skin, made of layered clay. Beside it, one perfect concentric ring is separated, showing its translucent lavender and white gradient layers. They rest on a cutting board at a pungent, foundational tilt. Warm, tear-inducing and culinary-base lighting on pure white background.