OTOY Forums

Hello octaneers!

Another problem with mesh lights.
I have a scene in witch my lights spots don't act "normally".
Here are some pictures of the problem.
The spots are the same object with the same materials applied(mesh lights).

In the test with no ambient light you can clearly see the problem.
In the PT test the light is on but not in the same amount like on the right side.
In the DL test there in no light on the wall.
On the left side the emitter is on but there is no light on the wall. On the right side the emitter is on and there is light on the wall.

Can somebody please help me on this matter?
Or if it is already solved can you please point me to that topic?

Thanks!

Hi pimpuppy,

I have been doing so many tests these past couple of days to try find a solution.
Your problem seems to be a bit different to mine but I may have a few solutions for you.
1. Check you normals for the objects emitting the light.
2. Are the objects emitting the light one object or seperate objects. Try both ways. So either all the lights will be one object with your 3d program or all of them seperate with the same material.
3. Try having seperate materials for the front and side lights(then play around with the power). No idea how or why this would work but its worth a try.

In all my testing Pathtracing usually sorted out the problem but I dont have the luxury of keeping a render on for 10 hours. But I did find that small objects emitting light really didnt work in both DL and PT.

I really hope that is it a simple solution such as the normals though, these mesh lights seem to be a bit difficult to get used to.

Hi Design Union and thank's for the reply.
It is not that simple unfortunately. The normals are the same in both light objects. The objects are the same(it is a component that it is multiplied). It worked well before in many projects. And from this one it is not.
As you can see in my PT test the light on the side wall it is there but not in the same intensity like on the front wall.
I'll try to use an emitter from liveDB to see if it works.

the test with emitter material from livedb.
the problem is still there.
i'll try to model the object again and re export from sketchup.