things will make TMAX (or any other silver based B&W film) liik grainier: 1) Texture-less parts of the image, as someone else mentioned, like a cloudless sky. 2) Overexposure, more likely on a sunny day. 3) Lens flare reducing image contrast, see #5 4) Sloppy developing technique and/or exhausted developer, see #5 5) Printing with higher contrast paper, to get a punchy look, or to make up for #3 and #4 above.(posted 9735 days ago)I tried putting some Tmax in my favorite lab for color once years ago and the prints were grainier than the Tri-X I used to use, developing myself, prompting me to use XP-2 until I started doing my own B&W again a couple years ago.