I'm setting up a studio to make videos. My space has walls that have been covered with stucco-style paint. In other words, they're rough. I want to have a green-screen background behind me. If I paint these rough walls with chromakey "video paint" will little shadows mess with the chromakey effect and defeat the purpose? In other words, do I need to put some other flat surface in front of these walls? Hope this question makes sense!