1
$\begingroup$

I am trying to use a gobo in cycles but having no luck at all. Seems that the transparency is not working. What am I doing wrong? Is the PNG broken?

Thanks, Douglas E Knapp

$\endgroup$
  • $\begingroup$ Thanks. Chebhou. Can you do it as part of a spotlight? PS the UV unwrap was not part of my first question but a second try by me to make it work. $\endgroup$ – Douglas E Knapp Mar 5 '15 at 19:10
2
$\begingroup$
  • You have unwrapped your object but didn't use the UV coordinates
  • you are using the color from the image instead of the alpha
  • the non transparent part of the object is better to have a material

here is node setup for the object :

enter image description here

  • if you want the other part to be transparent switch the order of the 'transparent' and 'diffuse'
$\endgroup$
2
$\begingroup$

I'm personally doing it this way:

  • Create a Sun
  • Set the Lamp size value to 0
  • Create a plane in front of the sun
  • Unwraping it and extend border edges to cover your scene
  • Add the gobo (see the network in the GIF below)
  • RENDER !!
  • Node Setup

    Click here to see it on Gfycat

    $\endgroup$
    • $\begingroup$ can you please make a static (and bigger and more readable) image of the node setup? and add it to your answer? $\endgroup$ – cegaton Nov 30 '15 at 22:16
    • $\begingroup$ @cegaton Sure. Edited $\endgroup$ – Akelian Nov 30 '15 at 22:22
    • $\begingroup$ nice (second) answer. Good job, keep it up. $\endgroup$ – David Nov 30 '15 at 22:33

    Your Answer

    By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

    Not the answer you're looking for? Browse other questions tagged or ask your own question.