Premium Apparel Mockup: Ultra-Realistic Regular & Oversized T-Shirt Display

use the uploaded logo, graphic or print as the strict and exact artwork reference. create a premium commercial apparel mockup showing two blank [colour] t-shirts: one regular-fit crew-neck t-shirt and one oversized crew-neck t-shirt. apply the uploaded artwork accurately to the requested [front centre/back/chest] placement on both garments. preserve the exact artwork colours, spelling, typography, letterforms, symbol, line thickness, shape, internal spacing and proportions. adapt only the overall artwork size to suit each garment’s fit and available print area without stretching, cropping, rotating or redesigning it. display both t-shirts upright with a realistic invisible-mannequin effect and enough separation to compare their silhouettes clearly. reproduce natural cotton jersey texture, neckline ribbing, shoulder seams, sleeve hems, stitching, garment thickness, realistic gravity folds and soft contact shadows. maintain accurate print perspective and allow the design to follow the fabric surface naturally without looking pasted on. use a clean light-grey seamless studio background with broad diffused frontal lighting and subtle side definition. treat the uploaded garment and artwork as strict references. preserve the exact spelling, typography, colours, symbol, proportions, fabric, stitching, fit and requested placement. do not redesign the artwork, replace fonts, invent details, add branding or change the garment construction. no visible mannequin, body parts, model, hanger, props, added text, watermark or additional graphics. ultra-realistic commercial apparel mockup, high-resolution 8k quality, vertical 4:5 aspect ratio.