Why does these two images look so different?

[Welti]

The OctaneRender and LuxRender output of the same scene. Why are they looking so different? In Lux the light source is at medium power, in Octane it has the highest value (100000.0000). I know the lightsource is very small (0.01x0.01x0.01 Blender Units) but i thought OctaneRener could compare to the big CPU-Based unbiased Raytracer.

[MaTtY631990]

Did you make sure scale is the same for both engines.

[Welti]

They are the same (for both the light source is 2cmx2cmx2cm). Even SLG does it right:

[mib2berlin]

Hi Welti, could you post the blend?

Cheers, mib.

[Welti]

Of course, here it is.

[benjamin9999]

the octane output looks like directlighting instead of pt or pmc.

[mib2berlin]

It would be interesting to post this file in luxrender forum.
My tests with SLG3 pathtracing and Indigo looks similar to Octane, SLG3 BiDir Pathtracing (CPU) looks very different.
It is something wrong here (or there).
For spots you can use IES lights in Octane, manual page 119, it is much more effective.

Cheers, mib.
EDIT: Rendertime 2 Minutes/Pathtracing.

[roeland]

To get some caustics under the sphere you can try to set the caustic blur parameter to 0.1. You need the latest build (v1.00 RC3) in the release candidates forum for that.

mib, what material settings did you use for that render?

--
Roeland

[mib2berlin]

Hi roeland, room is standard diffuse, glas is 1.0 reflection, 0.8 transmission.
Lightning is a small plane with erco IES file.
I use very high motion blur for testing only.
The problem is Welti´s file renders very different in Luxrender and Octane and Luxrender is a full spectral render engine which work physical correct.

Cheers, mib.

[Welti]

Luxrender is a full spectral render engine

Octane not?

Where can i download 1.00 RC3?