We'll introduce OneRender, a photorealistic elastic cloud solution for accelerated rendering. OneRender is connected with Onshape.com, a leading cloud CAD solution. We'll present a general overview of these two platforms, and explain how they connect to each other. We'll talk about the challenges and solutions to communicate complex geometries from Onshape CAD format to OneRender format, and continuously maintain consistency with any change in the former. OneRender core engine is built on top of the NVIDIA OptiX framework for ray tracing and GPU-based acceleration. Furthermore, OneRender has the capability of launching multiple GPU clouds in parallel to accelerate rendering process. Then, we'll give an overview of the GPU usage vs user arrival and workload growth. Finally, we'll show some examples of real-world CAD designs and photorealistic renderings visualizations.