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Particle Smoke, Self-shadowing & light shafts?

In the Content Demo 'Effects' example I have been experimenting with cloud self-shadowing. I have been trying to produce this effect (light shafts in smoke):

https://dl.dropboxusercontent.com/u/15053325/SmokeyLightShafts.wmv

However, I am no sure whether it needs esoteric settings or is simply not possible.

I have already read these posts but no solution was forthcoming:

(1)
https://docs.unrealengine.com/latest/INT/Resources/ContentExamples/EffectsGallery/1_H/index.html

(2)
https://forums.unrealengine.com/showthread.php?51130-Trying-to-get-particle-shadows-to-apply-to-other-particles

(3)
https://answers.unrealengine.com/questions/135909/gpu-particles-have-issues-when-shading.html

Let me know if you have any ideas.

Alternatively,

If particle smoke could produce light shafts from a DirectionalLight (in the same way that solid objects do) then that solution would also be acceptable.

alt text

Product Version: UE 4.10
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asked Nov 28 '15 at 07:32 PM in Rendering

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ash22
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