Thanks for your suggestions Using your alpha plane file , i see the background photo in the active preview windows but ,when i render, the background photo disappear and i see the sky behind. Anyway , i see that my photo not really match with the foreground so i must find another one in my phoyotheque I am also using Vue Infinite 2016 and i have the reference manual. I will see if i can use the billboard. In Poser and DAzStudio, using a background photo is more easy and the result is very good