3D Ghost Mannequin T-Shirt Mockup

photorealistic 3D ghost mannequin mockup of a completely blank plain deep charcoal or washed black t-shirt, front-facing, no print, no logo, no text, no graphics. Invisible mannequin form only, realistic drape, collar, sleeves, seams, and a smooth clear chest area for adding a design later. Background: calm meditation corner with light sage mat, cream floor cushion, incense holder, plant, warm lamp, softly blurred. Soft overhead/front studio lighting, subtle shadow, premium ecommerce hero image, square 1080x1080. The dark shirt must stand out from the background with clear edges and no chest obstruction. No shirt design, no words, no logo, no watermark, no black-on-black background, no low-contrast dark wall directly behind the shirt, no hair/hands/props covering chest, no jacket/cardigan/overshirt covering shirt, no medical or therapy claims, no harsh dramatic shadows, no clutter overpowering the shirt, no fake brand tags. For dark shirts, avoid muddy lighting and keep edges clearly separated from the background. No visible mannequin, no human model, no hanger, no folded shirt, no empty sterile studio background.