Oil, my 2ond. The creek is from a teaching book and the girl I added in. I have since added alizarin into the folds of her dress and over some of the white in back of her legs..and it looks like the light is coming right thru! Took me a week and still I could not get the rocks right or some of the trees…lol…paint on, whoops, paint off, paint on, paint off. So I sure could use some pointers on this painting! Please share your thoughts and ideas with me I can use all the help I can get.