Interior daylight with a Skydome

- [Narrator] Rendering photo metric daylight interiors…in Arnold can be challenging.…An effective workflow is actually simpler than it seems.…All that's really necessary is a skydome light…with medium to high render samples.…We just need to be aware that our…render times will increase accordingly.…If you need fast renders…then create a studio lighting setup as we saw…in the previous chapter.…The Arnold product documentation…warns that skydome importance sampling…is not optimized for interiors…and that you should use light portals over the windows…to remove noise or grain in the rendering.…

You can find light portals in the Arnold menu under lights.…Light portal.…Let me explain to you precisely why…you should not do what the manual says…and don't use light portals.…A light portal is a simple rectangle like a quad light.…It's purpose is to focus computation…by tracing rays from objects…through the windows and out to the skydome light.…You see in ray tracing the rays start from the camera…hit the scene objects…and then bounce off those objects…