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SIGGRAPH: Accelerating Cycles using NVIDIA RTX


NVIDIA developer Patrick Mours has released a patch for Optix raytracing acceleration in Cycles. His code adds a completely new rendering 'backend', next to Cuda and OpenCL. The code is currently in review, but first results already predict a 25-50% render speedups.

Patrick writes:

Over the past few months, NVIDIA worked closely with Blender Institute to deliver a frequent user request: adding hardware-accelerated ray tracing to Cycles. To do this, we created a completely new backend for Cycles with NVIDIA OptiX, an application framework for achieving optimal ray tracing performance on NVIDIA RTX GPUs. Now, Cycles can fully utilize available hardware resources to considerably boost rendering performance.

If you’d like to try it out, the source code is currently undergoing review before being merged and is available for anyone to download, build and run. I’ve provided instructions in the linked review.

In this blog, I’ll discuss the technical approach taken, review performance you can expect and share possible a future direction.

About Author

Bart Veldhuizen

I have a LONG history with Blender - I wrote some of the earliest Blender tutorials, worked for Not a Number and helped run the crowdfunding campaign that open sourced Blender (the first one on the internet!). I founded BlenderNation in 2006 and have been editing it every single day since then ;-) I also run the Blender Artists forum and I'm Head of Community at Sketchfab.


  1. Are that work for GTX 1060 3 Gb ? If not please add to for GTX 10 series. The second option is EEVEE. Fast rendering, time is money. Can work both Nvidia GPU and AMD GPU.

    • Hi Firman - this option is specific to Nvidia RTX series GPUs, ie not for AMD cards, nor any Nvidia GPUs pre the current RTX GeForce and Quadro GPUs

      • thank you Pez, i will use EEVEE because my laptop not support it. EEVEE also can use in low spec PC / Laptop. I had test it so fast.

  2. Gilles Charbonneau on

    Great news, this would also solve all the problems with Eevee's transparency if they ever implement it!

  3. Although great there are several other cycles improvements that even work on CPU why not release those the code is ready

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