3D Model: Create A Digital 3D Rendering Of A Floating, Flat Circular Cloud. The Cloud Should Have A Donut-like Formation, With Billowy, Fluffy Texture Made Of Soft, White Smoke. The Structure Should Feature Varying Tufts And Subtle Depth, With The Center Showing A Slight Grayish Contrast. The Cloud Should Be Illuminated By Soft, Diffused, Indirect Light, Emphasizing Its Delicate Texture And Gentle Shadows To Bring Out The Fine Details. The Background Should Transition From Dark To Light Gray, Creating A Calm, Ethereal Atmosphere.