This question is a following of this one

I would like to light the center of a cylindric volume with a gradient light White -> Red -> Blue radially from the center to the border.

I made a test of the lighting one a plane mesh and get this result (after some settings) :

enter image description here

The color gradient is OK

Now I renderer the cylindric volume at the same position than the plane.
And I have this result :

enter image description here

This is nearly what I want.

Nearly, because I had in idea to see a white glow inside the volume and the outter volume seems to hide the center of the object.

I tried to change the density, reflection, and scattering settings of the volume but I didn't succeed to see the white glow.

Is it possible to give transparency to a volume and see the inside lighting with special settings ? Or not ?

  • $\begingroup$ transparency = density with volumes. If your inside is really white glowing as you claim, make the center more dense and the outside less dense. I am sure you will see the center. $\endgroup$ Apr 15, 2015 at 14:55
  • 2
    $\begingroup$ It would be better not to light the volume with a light but let the volume emit light itself - with an added emission shader. The center could have more strength than outsides and you can control the color easily imho. $\endgroup$ Apr 15, 2015 at 14:58
  • $\begingroup$ @Jerryno Note that volumes can't actually emit light in BI (as in illuminate other objects) $\endgroup$
    – gandalf3
    Apr 15, 2015 at 18:50
  • $\begingroup$ @gandalf3 oh this isn't cycles..you are right $\endgroup$ Apr 15, 2015 at 19:25
  • $\begingroup$ Related: blender.stackexchange.com/a/14469/599 $\endgroup$
    – gandalf3
    Apr 15, 2015 at 19:27


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