CtB Elements:
fruit-apple.png - fruit-pear.png - fruit-orange.png - fruit-grapes.png
These are the main fruit graphics for CtB. Keep in mind that, like hit circles, they undergo colour change, so using black to white is suggested.
But something doesn't seem right? They don't have their stems!
It's also suggested to have an approximately distinguishable shape, to distinguish hyperfruits from non-hyperfruits.
fruit-apple.overlay.png - fruit-pear-overlay.png - fruit-orange-overlay.png - fruit-grapes-overlay.png
Each fruit has it's own overlay. Unlike the fruits themselves, they are not affected by combo colours. This also means you can grant a little colour tint to a fruit or slap a little happy face on all your potatoes if you want to.
There are also a few other fruits.
fruit-bananas.png - fruit-bananas-overlay.png
The bananas also determine the score gain during a spinner. Keep in mind that they spawn in a random colour close to yellow. if you want your own set colour, you'll have to nullify the actual bananas and put it in the overlay.
fruit-drop.png
Unlike the other fruits, this one has no overlay, so in essence, it will only hold to the combo colour. Keep in mind that these are used for the slider ticks AND the slider droplets, so basically all of the insides of sliders will use this graphic.
fruit-ryuuta.png
The final element of CtB, the catcher himself, Ryuuta. Try to make the catcher distinguishable from the rest of the game, and make sure the player can identify well when the fruit is to hit the plate. Having a thin line flying around may be nice for some players, but doesn't help a vast majority.
fruit-platter.png
There is also the platter itself. It's there go over the fruits once they have been caught, to make it seem like the catcher actually has the fruits in his platter. As far as i know, this is defunct, but still useful to know if you want to make sure older versions are ok.