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I was making an scene and thanks to the help of the people here, i managed to make a volumetric light..but now that i think the 'borders' are too sharp, and this light (seen on the picture) is nothing more than a deformed cube, so i need to know, it is possible to for example just select this single geometry and make it look blurry? actually what i need is to make the borders more blurry (like a light), but it could also help me in the future for references. (Oh, and I'm also using Cycles)

If anyone know how to do this, please let me know.

enter image description here

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  • $\begingroup$ Try changing the density of the volume $\endgroup$
    – J Sargent
    Commented Feb 9, 2015 at 19:44
  • $\begingroup$ Hmm, i already tried that, but if i do that, the texture/color (white) also goes a little transparent, i want to still keep the color/intensity. :/ $\endgroup$
    – beavoru
    Commented Feb 9, 2015 at 19:54
  • $\begingroup$ Hmm . . . I'm not sure then $\endgroup$
    – J Sargent
    Commented Feb 9, 2015 at 19:55
  • $\begingroup$ related: blender.stackexchange.com/questions/15669/… and blender.stackexchange.com/questions/15669/… $\endgroup$
    – user1853
    Commented Feb 10, 2015 at 3:48

2 Answers 2

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change the object index and use this node setup in the compositor

enter image description here

the id mask will create a mask from the object and the erode will give it smooth edges

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  • $\begingroup$ How can i change the object index? If i do that, it will not erase my previous node setup? $\endgroup$
    – beavoru
    Commented Feb 9, 2015 at 21:01
  • $\begingroup$ in OBJECT tab under RELATION there is PASS INDEX set it to 1 $\endgroup$
    – Chebhou
    Commented Feb 9, 2015 at 21:07
  • $\begingroup$ it won't effect your previous node setup $\endgroup$
    – Chebhou
    Commented Feb 9, 2015 at 21:22
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    $\begingroup$ Compositing with dilate/erode (or blur) will affect the light circle on the ground too, needs testing IMHO. $\endgroup$
    – Bithur
    Commented Feb 9, 2015 at 21:51
  • $\begingroup$ When i go to pass index 2 if i edit the nodes, the nodes dissapear on the index 1...why? $\endgroup$
    – beavoru
    Commented Feb 10, 2015 at 20:00
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size up your mesh with volume shader. the light is supposed to be inside, but sharp borders are your meshe's borders.

enter image description here

Or change the blend factor of the spot shape.

blend fac of spot light

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