OTOY Forums

Hi All

So i have a scene that has quite a large mirror in it, and i am using emitters to light the scene.

I have set all the emitters to Opacity 0, yet due to its position, one emitter in particular causes a reflection in the mirror. Not a solid reflection, but a cloudy one.

I have since re-arranged the emitters so none are in positions to cause these reflections, but for future reference, is there a way to prevent this from happening?

That seems odd. Can you post an image showing it reflecting with opacity 0 and 1 so we can see the reflection and the position?

Would it be possible to post a screenshot of this issue happening pls? It would also be worth double checking you rayepsilon and nearClipDepth. Also try a different render kernel and see if it happens there.

Have attached screenshot of the effect, and material node of the emitter in question. Hopefully you can see the effect in the screenshot, this is a quick re-creation to duplicate the reflection. I have outlined it in black - emitter is slightly smaller than the outline

rayepsilon and nearclipdepth are both at 0.0001

Does setting the diffuse color to 0, 0, 0 help?

does not seem to have any affect at all, at least not a noticably.

I did try the different kernels, it occurs in both PMC and pathtracing, but not in direct lighting

I just setup a test scene to try to simulate this and could not reproduce the issue you are having.

Is the emitter ON the back wall, or is there a gap?

If you remove the figures from the scene, and just have the mirror, back wall and emitter does it still happen? If so - would you be able to post the pz3 file pls, and I can have a closer look.

Paul

To me it looks like you didn't hide a material (looks like it has a frame material left) or the emitter is a strange made prop (might have more than 1 polygon too close to each other).

Try adding a square with only 1 polygon (single sided). If that works, then your current emitter is the problem.

If you don't have a modeling program you can use this as a test.

Hi All,

Apologies for the delayed reply, a couple of days ago i had my SSD fail on me, and i lost everything i had done since my last runtime backup ( i generally back up everything on my SSD every few weeks), which included this scene. Lesson learned, i think i will just move everything to one of my externals and point poser to that, saves having to do this again.

I will be getting a new SSD tomorrow, and after everything is re-installed i will try to re-create this scene, which will be easy enough.

To answer above questions:

Prior to my lame SSD failing on me, i did check to see if the emitter was colliding with any of the walls. It was close, but not touching.

It might be the emitter being more than 1 polygon - the scene had originally been setup using a pre-made IDL dome and panels for poser, and when i decided to use octane for the scene i just used the IDL panels as emitters. However i know that if i tried to look at the emitter from the side, it vanished.

Thanks for all the replies, i will revert when i can