A lot of rendering we do in architecture have to be inserted in a picture of the environement. And we can't have an alpha layer on the rendering, so we need to cut out the picture, and it take a lot of time. It would be nice if we can have the alpha layer with cinerender.
Other layers are very usefull when we are making presentation picture from the rendering:
- Shadow layer : to put the shadow of the building in the environement picture
- Reflexion layer : for exemple to put the environement sky in the windows
- Object Layer : if we just want to change the color of a rail in the final picture, we just have to use the mask to select it, instead of making the render again.