Filling in maps?

[The Ultimate Koopa]

I meant is it advanced enough to be able to read all images in a folder and work out which has the most matching pixels to the previous picture?

I guess not.

[DarkWolf]

That would take forever, and in some cases produce false matches.

[The Ultimate Koopa]

Yeah (it was a stupid question).

Also, if I was able to find out the specific "tile" for the coral texture, so that they could be pasted next to each other, and match up perfectly, what's the easiest way of filling in very small gaps?

Is there any program of any sort, in which you can literally "paint" the texture?

[Maxim]

It's unlikely to be the same for all the gaps. Better to identify the 32x32 (probably) square and copy/paste it on, for each affected square. I do have a program knocking around that can do this automatically, but it's probably not a great idea here.

Paint Shop Pro 7 can flood-fill (or paint) using a repeating pattern in a grid-aligned way.