OTOY Forums

Hey, I just found something interesting when using an emitter object with an HDR background. I had always assumed that an HDR background was independent from any other light sources and was essentially, infinitely far away from the camera in all directions. So if I put an emitter object somewhere in a scene and ramp its power up to a really high value like a little Sun, it should be able to do so without affecting the HDR background. But it looks like this is not true. I have a test scene I am running and if I ramp up the power of the emitter, it overexposes the HDR background as if the HDR was a physical object in the scene lit by the emitter.

Hi treddie,

Can you please post the scene or send to [email protected].
And also let me know what version of octane you are running.

Cheers
Chris.

Chris,

I am trying to finish up this experiment. I think what I will do is when I have it ready, I will post it in a new thread with the contents of this thread so that everything is consolidated, because it may be that what I am doing in that scene is the reason it seems to be happening. This might be pretty fun as a topic.

I moved this discussion over to my other thread, "Experimenting with lens flare entirely within Octane" since that experiment is where this issue happened.