Photorealistic Grey Crew Neck T-Shirt

1080x1080 pixels, square format 1:1 aspect ratio. Professional photorealistic product photography, top-down flat lay perspective. A blank heather grey crew neck t-shirt with no design, no logos, no graphics, no text, no prints, laying on light concrete surface. The t-shirt is made of realistic soft cotton fabric with visible natural cotton weave and textile texture. The material looks like authentic worn-in cotton, not smooth, not shiny, not synthetic, not digitally rendered. The t-shirt fills the entire frame. The sleeve cuffs touch the left and right edges of the image—no background visible between the sleeves and the image borders. The collar nearly touches the top edge. The bottom hem reaches the bottom edge. Only tiny triangular corners of background are visible for props. The fabric has soft relaxed waves and gentle ripples throughout the body. A folded denim jacket in the bottom right corner (55% cropped by frame), a sports smart watch with a silicone band in the top left corner (60% cropped), a folding sun umbrella handle visible in the bottom left corner (70% cropped). Soft diffused lighting from above with subtle shadows. 8K quality, photorealistic.