Do I need visa photos when traveling to Thailand on a 45-day visa exemption?

You don't need a visa depending on which country you are from. You will get a 45 day visa exemption when you arrive.

If you're from the US and coming in without buying a visa from a thai consulate before you come you will not be getting a Visa On Arrival 😮 In fact you won't be getting ANY visa at all. All you will get is a free 45 day entry stamp which is called a "visa exempt entry" 🙂

Be that as it may

You need 4x6cm photos for your 30 day extension application at the immigration office once you get here. Oh and no one will care in the least what 'finish' is on them.

There's a good chance the photos you had made to apply for the tourist visa would be fine so just bring them along.

Usually there's a copy shop/photo place conveniently located next to or near what ever immigration office you use for your extension so there's no gun to your head to get the photos now 🙂