ArtVPS has released their Shaderlight v0.1 plugin for 3ds Max, enabling interactive rendering while adjustable parameters that can be changed at any stage in the pipeline.  Not only can you change camera angles and object positions, but you can change material properties, textures, and lights on full-quality rendered images.

“As a CG artist I often have to work with clients who have no real idea of how long even the slightest change to an image can take to re-render ” says Olaf Finkbeiner CGI operator at Mainworks GmbH Germany and a member of the Shaderlight Product Steering Committee. “The ability to make changes to materials or environments on a final image would save us days of re-rendering and in this industry time is money.”

via News – ArtVPS.