I only had a little bit of time to play with this tonight...
YafaRay is fast compared to some other rendering software.
Area Lights in YafaRay have a big impact on render times when using lighting methods that use GI. I wish they could improve on that. If you hide the Area light you will see that the scene will render much faster.
You will also see that the Ambient light you added is not lighting the scene because Background/Environment is set to "None". To light the scene without the Area light, set it to "Constant" and the color to white. Set the power to at least 1.0 to light the scene. Enable "Enlight" and "Diffuse Photons". Set "Samples" in the Ambient light to a higher number (At least 8 ) to avoid a grainy render.
Not using an Area light probably does not give the proper results for a Cornell Box....
I will see if I can spend some more time on this tomorrow.
oort
YafaRay is fast compared to some other rendering software.
Area Lights in YafaRay have a big impact on render times when using lighting methods that use GI. I wish they could improve on that. If you hide the Area light you will see that the scene will render much faster. You will also see that the Ambient light you added is not lighting the scene because Background/Environment is set to "None". To light the scene without the Area light, set it to "Constant" and the color to white. Set the power to at least 1.0 to light the scene. Enable "Enlight" and "Diffuse Photons". Set "Samples" in the Ambient light to a higher number (At least 8 ) to avoid a grainy render.
Not using an Area light probably does not give the proper results for a Cornell Box....
I will see if I can spend some more time on this tomorrow.
oort