Hi Haze, Thanks a lot for your reply.
well, still my main problem, is about what the scattering and the absorption parameters exactly does, would be nice to get a quick brief about how the octane volumes works.
Sometimes is hard to get control about the smoke for example, because i can find any ...

Awesome!! Thanks a lot for the tips haze, really useful!
Here some pics using your tips.
Using White Color in Medium Scattering and scele to 10 for "test1.jpeg" and 100 for "test2.jpeg"

Nice to hear about the ramp color for the density in the next built, would be nice aswell to get a shadow density ...

Hi Juanjo, i tried to upload the scene, but unfortunately the explosion volume cache size is so huge, anyway... step by step i am understand how works octane for volumes, here a couple of pics.

Hi juanjo,
i am pretty new using octane, and i am learning how to use octane to render some volumetrics stuff, i saw this post: https://render.otoy.com/forum/viewtopic.php?f=102&t=52340&hilit=density, really interesting things there, thanks a lot, could you share some tips, or some steps to keep on ...