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This is a simple test comparing Octane Vs Thea ies lighting.

This is a closed room with 64 photometric lights.
The same materials were created in Thea.

I used PT 16 bounces for both scenes and 5 minutes of rendering.

Octane ies lighting, distribution, sampling, directional features have to be reprogrammed from scratch.

Make your conclusions.

regards

Gabriele would you mind sharing the same scene I'd like to give it a go with other renderers
best

this is huge diffirance

gabrielefx wrote:This is a simple test comparing Octane Vs Thea ies lighting.

This is a closed room with 64 photometric lights.
The same materials were created in Thea.

I used PT 16 bounces for both scenes and 5 minutes of rendering.

Octane ies lighting, distribution, sampling, directional features have to be reprogrammed from scratch.

Make your conclusions.

regards

That's a bold statement. What's the shape of the emitters? Unfortunately you made them transparent so we can't see them.

Strange, so what's this?

gabrielefx what did you use to orient the IES lights? I hope you didnt simply rotate the area lights to point downward..

Dobs

I used path tracing, not direct lighting.
I will post the Max scene.

This is the scene, it's quite simple.

You will find a layer with 64 flat 2d emitters, you can turn it on. This layer works better than standard ies, less noise, in fact I always use shapes for ies lighting.
I think that Karba did some mistakes creating ies lights in Max or there are issues in the kernel.

gabrielefx wrote:I used path tracing, not direct lighting.
I will post the Max scene.

yes, this is PT.