I've got a scene where a sun is shining through a couple of windows:
I want to make it so that there is a light ray effect between the windows and where the light hits, like this: 
Here's what my lighting setup is: 
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asked Dec 7 '16 at 20:33
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7$\begingroup$ Related blender.stackexchange.com/questions/33150/… and blender.stackexchange.com/questions/12218/… $\endgroup$ – palkonimo Dec 7 '16 at 21:20
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$\begingroup$ Research volumetric lighting $\endgroup$ – 10 Replies Dec 7 '16 at 22:11
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$\begingroup$ @JoshSilveous I don't know why the question has been marked as duplicate, given that the linked duplicates are not all the issues you are having. You can't do volumetric lights with a sun light (read: blender.stackexchange.com/questions/68668/…) Then you need to modify the glass material so that light can actually travel through the glass material you have on the window. See:blender.stackexchange.com/questions/47851/… $\endgroup$ – user1853 Dec 8 '16 at 4:39
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$\begingroup$ Also related: blender.stackexchange.com/questions/68410/… and blender.stackexchange.com/questions/38830/… $\endgroup$ – user1853 Dec 8 '16 at 4:42
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$\begingroup$ Then you have two choices to do volumetrics either add volume scattering as volume on the world, or enclose your object into a mesh that uses volume scattering. See: blender.stackexchange.com/questions/45153/… and blender.stackexchange.com/questions/49893/… $\endgroup$ – user1853 Dec 8 '16 at 4:45
