Yeah, as said above, a large chest doesn't tend to show through a shirt that well unless the shirt is A. very tight (in which case the breasts would likely end up a little smooshed), or B. the shirt is designed on a way to give room for a bust to show. A normal, everyday shirt would more or less just have the fabric drape over the chest. Most fabric does not have a natural stretch to it, so it's unlikely to maintain a shape that shows off every curve in a human body well.