3D design software has since long employed graphics chips for low-quality real-time previewing. But their dramatically increased computing power now paves the way to accelerate the final high-quality rendering, too. While as yet only one major 3D software package offers a dedicated "hardware renderer" for final output, a small number of design applications can leverage the graphics card to support game creation: They display vertex and pixel shader effects in the same way as they appear on the game's screen. We present an approach unifying the use of graphics cards for game design and for final rendering. It is implemented as a plug-in for Maxon Cinema 4D, a standard commercial software package for modelling, animation, and rendering. We examine which factors determine the performance of this solution and discuss corresponding improvements. Keywords vertex shader, pixel shader, Cg high level shader language, .fx shader files, shadow maps