Some examples of what the different terms represent:
Signature
Image
Artwork (aka. LP = Large Piece, an LP is basically everything with dimensions over 500x500 pixels)
Another form of Artwork, a C4D (created using the program Cinema 4D)
A third form of Artwork, a terrain piece (there's not really a name for it, just call it an LP) created using the program Terragen
4th type of Artwork; Pixel Art
I hope this help you a bit
