This has been taken from the Granny Wiki. It contians all of Granny's appearenced from v1.0 to v1.8.2
The first appearance of Granny in-game had very flat textures and almost no shading. She didn't have legs in her model yet. Almost 2D!
Granny's model, along with textures, were replaced by ones borrowed from Granny: Chapter Two, with black hair like in Granny 3 and The Twins, different shading, and a lack of buttons on her dress. However, in Nightmare mode she still has her old textures.