Collage illustration

i was looking at some illustrators on the internet that use collage in their work, especially mixing photographs with drawing, because this is how i made the 'its not innocent' posters. I came across this illustrator Roger Chouinard who works as an artist, animator and illustrator. These illustrations incorporate found objects, photographs and drawings. i really like how he juxtaposes these different styles and the funny images he creates. i have also learnt from lookin at these that my fruit and stuff looks like its floating around and not sitting on anything but he uses shadows to give things weight so i think i need to do this on my posters.