IES Photometric light passes through objects

[WeazzeL]

Hi,

I have a problem, i have a bookcase and some parts of it will be covered with a white semitranparent plastic and a light bulb in the back. They should emit a light similar to Vray ambient light.

Now in max, i created all, used a photometric light with IES profile a (not shure if is necesary, just copied one of the lights)nd vrayshadows, i created the plastic material just with refraction seetings.

Problem is that the light seems to spread wierd in the scene (like it is passing through objects) near the light source. If i cut the refraction to 0 it is total dark ... so the geometrics are well done. i should only see that lit square, something like vraylightmat (i could use that, but i want to create a more realistic effect, to see the form of the light.

Here is a pic

Thanks

[WeazzeL]

Nobody?

[Bruce Hart]

Assuming you are using Irradiance mapping and Light Cache - have you tried turning off Store direct light in LC, and/or switch on check sample visibility in the IM? Are there more fill lights to come in your scene?

[bijoy]

hmm...could be the size of the light...did u add a falloff setting to the light? maybe try vraylight and change it from plane to sphere and play with the size and intensity...

[WeazzeL]

Thank you for your replyes.

Yes, i am using IM+LC and there are no other lights in the scene (turned off). The problme seems to be the refraction. When i make the front panel refractive, lights kind of reflect from that panel to the back. I did all you sugested bud no changes, it doesen't matter if it's a standard light or vray light, same results, nor the size or intensity.

ps. i excluded the bookcase from my light .... and i get the same results. a little bit better, but same problem

[Ismael]

Seems like bad geometry. How did you model the bookshelf?

[WeazzeL]

bookshel is made of long boxes with some champfer, intersected eachother. not from small segments. i didn't attached them though.

here is another problem, i have a lamp half inside the wall. same problem, light reflects from wall on the lamp where it shouldn't.

[Ismael]

"intersected eachother"

There is most likely the problem. If you model in 3d like you would build it in reality, you would not be having such issues perhaps.

[WeazzeL]

it's possible, but take that lamp example, the left lamp, the top of the lamp has a non refractive material and no reflections. it is a third inside the wall. there shouldn't be light reflecting to that material.

[WeazzeL]

it's wierd that nobody had these issues, it means i am doing something wrong, but i can't figure it out.

[andstef]

try Brute Force instead of IM + LC, or raise the Hsph subdivs in IM