New veneers have spaces between them? (Photos)

I just replaced my upper veneers and I noticed spacing between each tooth. I'm wondering if this may look different over time (just had them done today) or if I'll need to redo them entirely. When I brought this to the dentists attention he just brushed over it. I realize I may be picky as they were just done but I feel like the spacing creates a dark line/shadow on my teeth and I don't have the smile I was envisioning. Perhaps the veneers were just sized too small? Thank you kindly.