Visible lights - Caustics

[Anonymous]

I can't get the visible light with a spotlight shining through the portal windows in this sanctuary to show. I think I have all the settings right but can't get it to change the rendering at all. I want to put in stained glass in the windows and show the visible light coming through. Any ideas?

[Barry Kelly]

Is this the effect you are after?
In the spotlight I turned on the visible light and set it to volumetric.
Other than that I am still trying to learn myself.

Barry.

[Anonymous]

Thanks that worked except the colored glass that I put in for the window glass doesn't show up in the rendering.

[Karl Ottenstein]

Did you perhaps only change the color of the material in the OpenGL tab of the surface settings, and not in the CineRender surface settings?

[Anonymous]

Karl wrote:
Did you perhaps only change the color of the material in the OpenGL tab of the surface settings, and not in the CineRender surface settings?

I applied a jpeg of stained glass to the glass part of the window and then attempted to have the beams of light shine through. I can set a color for the transparency but that doesn't show the jpeg.

Thanks for the ideas. I'll keep fiddling.

[Karl Ottenstein]

outpostarc wrote:
I applied a jpeg of stained glass to the glass part of the window and then attempted to have the beams of light shine through.

This is a great learning exercise. Glad you brought it up here. Setting the image of the stained glass to be in the transparency channel works for me in preview. I'm still waiting for the final render to generate though...

...and, I have no idea how to align the image to the desired position within the glass...

[Karl Ottenstein]

Took forever for the sample example attached to render. But, the result is kind of cool with the visible light picking up the colors of the jpeg image of a stained glass window.

I'm disappointed that I cannot figure out how to align the transparency channel image (jpeg) with the glass. I had sized the image as 6' x 10' and made the window that size. (Should have made the glazing that size of course... but still, would have expected alignment to be one of the lower corners of the glass - e.g., local surface origin.)

[Anonymous]

That's cool. What light source did you use and did you apply the image only on the transparency channel?

[Karl Ottenstein]

outpostarc wrote:
That's cool. What light source did you use and did you apply the image only on the transparency channel?

Yeah, I thought so too! BTW - I just tried this with Artlantis 5 which has so-called "god beams" for the sun/heliodon ... but while they project the stained glass image onto the floor, the visible light is just white - does not pick up the colors like here with CineRender. And has other issues (although it was fast). So, yeah: cool!

I used the Spot Light 18. It and just a few others allow for visible light.

Yeah, only used the image for transparency as in prior screenshot of surface settings.

[Karl Ottenstein]

Here's an Artlantis 5 render with the 'god beams'. Vastly inferior to the CineRender sample.. but I was wrong about the visible light color ... the beams do pick up a little of the color from the jpeg. But, this generated in a few seconds vs the couple of hours for the CineRender image...