A friend of mine asked if he could use my work in an advertising poster, and I agreed as long as credit was provided.  I sent him the file.  When everything was said and done, the poster came out looking much different than my original photo and absolutely beautiful.  It had not occurred to me that they might be sold, but I can see people buying this poster.  Do I have any right to ask for a compensation if the posters are sold? If so, how much?  A percentage?  In the future, is there a…See More