Pixar Open Subdiv

Octane 2.0 supports the Pixar Open Subdiv standard to subdivide and smooth the polygonal objects at render time. This allows subdivision surface refinement specifically based on Pixar’s OpenSubDiv implementation.

OpenSubdiv is a set of open source libraries that implement high-performance subdivision surface (subdiv) evaluation on massively parallel CPU and GPUThe GPU is responsible for displaying graphical elements on a computer display. The GPU plays a key role in the Octane rendering process as the CUDA cores are utilized during the rendering process. architectures. This codepath is optimized for drawing deforming subdivs with static topology at interactive framerates. The resulting limit surface matches Pixar’s Renderman to numerical precision. The code embodies decades of research and experience by Pixar, and a more recent and still active collaboration on fast GPU drawing between Microsoft Research andPixar.

Pixar’s powerful library for fast refinement of subdivision surfaces using the capabilities of graphics processors is integrated within OctaneRender™. This useful technique in animation is conveniently be integrated into OctaneRender™’s user interface, allowing subdivision surface refinement specifically based on Pixar’s OpenSubDiv implementation.

To support the Open Subdivs inside the Lightwave Layout, there is a new tab in the Octane object properties custom object plugin.


To render an object with Open Suvdiv you need the base mesh object without Lightwave subdivisions, so in the object properties panel both “Display Subpatch Level” and “Render Subpatch” should be set to 0 to avoid a double subdivision.

In the Octane object properties plugin you can set the Open Subdiv subdivision level and sharpness, the boundary interpolation and the subdivision scheme.