Problem with projected light areas

Help and Troubleshooting
1

Hi all! Once again I’m trying to visualize a luminaire sample I got to give an overview over my product. It’s a linear light with microprismatic cover and an additional PMMA cover polished.
As you can see on the photo of my sample, the illuminated microprismatic cover is projected onto the top surface of the PMMA cover which gives a nice depth-effect:

Image
Image.jpeg4032×3024 1.97 MB

Now on my rendering, I’m not able to get this effect, as the illuminated cover is both visible as it is and projected to the top surface of the PMMA:

rendering
rendering.png921×644 506 KB

I used a refractive glass as material and did some work on the transparency. Do you have an idea how I achieve the look as I got on my photo?

Thanks alot!

2

I think you can get there by using a Ray Mask node on the opacity of the illuminated cover.

With the Ray Mask node you can disable ‘visible for camera’ which will only make the reflection visible.

3

Thanks for your reply, Oscar!

Makes sense, but it seems that this doesn’t do the trick, because it removes the visibilty both in camera and on the projected surface.

Do you have another approach? Thanks!

4

Mmmz, I see what you mean. I can imagine it doesn’t work if the PPMA is solid and there is no air/space on above the actual light in the 3D model you use.

Like if I try this and move the emissive part outside the actual PPMA (like it has a bit of empty space above the actual light) you see it disappears. Physics wise I think that makes sense as well. So try to make it so that the emissive part doesn’t actually touch the PPMA.

Wonder if that does the trick :slight_smile:

5

Thanks for trying! My emissive part is actually not “inside” the PMMA, but enveloped by it. But not touching.
Maybe my problem is the third party in my assembly, the microprism semi-transparent. Here’s my build:

overview
overview.png826×812 10.9 KB

Now I’m slowly loosing oversight, maybe this overview makes a solution clear for you?

6

Maybe you can share the model or a simplified version using a private message with a link to wetransfer.com? Happy to try something but not easy without the model itself.

1 Like