To reproduce the effect of typical dust of the desert “pyrocluster-volume tracer added to the emitter”, have a look at the setting in the picture below.
Front view of scene - the “emitter” was located along the image of the scene. It is represented by the white rectangle.

View from the -all, the little blank sports are generated by the “emitter” they produce the effect of dust.
The material is almost incredible, as “Density” is only “0.08.”
Ps: For “Emitter”, have an “Environment” added to a node “Pyrowuster” - Volume tracer “. Then on a “Time line”.
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