[quote="minguinhirigue"]
Render[In] and Shaderlight are still in beta-phase but both have thoses abilities you are looking for.
quote]
The full release of Shaderlight was launched in October and can be downloaded from http://www.shaderlight.com. At the moment it's Windows only but a Mac version is due in Feb 2011.
Shaderlight is a tool designed to work with your workflow. Its simplicity and high quality results and seamless integration with SketchUp make it the perfect tool to dive straight in to.
Let us know what you think!