Global volume vs. Sky volume effect

[Farzad]

For environment fog/dust simulations,
what's the exact difference between Global volume and Sky volume effect in engine calculations, results and use cases?

[TomG]

The volume effect renders fast and quickly, as it is not a true volumetric material - it won't have any godrays etc. It is best suited for scenes that show a wide area, e.g. landscapes with distant hills.

The global volume material is a full volumetric effect, will show god rays etc. and will therefore be much harder to calculate (slower), and harder to set up as there are more parameters involved to get a particular desired result.

You can see info about the aerial perspective (Volume Effect) in https://blog.corona-renderer.com/corona-renderer-7-for-3ds-max-released/

[Farzad]

Thanks so much for your response,
helped a lot

[TomG]

Most welcome!