Is this what you are looking for? One of my colleagues went through this tutorial today, and I was impressed with the results.
"How to Make Realistic Explosions wth X-Particles 4 Explosia FX and Render using Octane Render"
https://www.youtube.com/watch?v=eh3qG0J ... e=youtu.be
Xparticles Voxel Rendering with Object Tag
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