Keep in mind, folks, that Blender dev team will be integrating eCycles programming into CyclesX very soon.  In fact, you can actually download eCycles Lite for free now, since that will basically become a native part of Blender in future releases.  eCycles was previously a separate build of Blender that contained impressive rendering enhancements, and the Pro version still has some features that are not available in any other render addon.

However, in my most recent testing and experimentation, I've found the Turbo CyclesX addon actually outperformed eCycles Lite in many of my animations.  This primarily came from the ability to "clean" noise from a volumetric fog in an animation that I previously could not clean up with Optix or the OID node in eCycles Lite or regular CyclesX before.  This was the one thing that completely sold me on the Turbo CyclesX addon as a true solution for difficult-to-render animated scenes.  I had about two or three scenes that I had to put on the backburner for months, simply because I could not render them in a reasonable timeframe with the quality I wanted.  Thankfully, now I'm capable of rendering these scenes without a significant upgrade in hardware.

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