OTOY Forums

2 problems:

1. For some reason AI lights make rendering slow (3 times slower) and with about the same amount of noise. Will this be ever fixed? It is about 150 Sampl/s with AI light OFF vs just 50 Samples/S with AI on

2 Why does AO have sucha bad direct light. Please look at the ground and trees there is no light. It's like AO light does not shine well.
unfortunately rendering animation with pathtracing in the city full of lights is still impossible. Please look into AO , please add a cheat where ao light can shine better on objects. I think it is an old bug or that's how AO was coded.


Thanks

Hello Coilbook,
it is difficult to obtain results as in pathtracing without GI, especially with SSS materials (such as leaves).
you could try using specular material in the leaves, it could have good results using AO.
About AI Light, I tested and he works as I think, but in your case your problem depends on noise from your emissions use.
you could not use so many luminous geometries; try using them for bright but not luminous objects. uses real light (lowpoly object) sources set to Opacity 0.
https://render.otoy.com/forum/viewtopic.php?f=27&t=60648&p=310376&hilit=+bulb#p310376
Regards
Paride

paride4331 wrote:Hello Coilbook,
it is difficult to obtain results as in pathtracing without GI, especially with SSS materials (such as leaves).
you could try using specular material in the leaves, it could have good results using AO.
About AI Light, I tested and he works as I think, but in your case your problem depends on noise from your emissions use.
you could not use so many luminous geometries; try using them for bright but not luminous objects. uses real light (lowpoly object) sources set to Opacity 0.
https://render.otoy.com/forum/viewtopic.php?f=27&t=60648&p=310376&hilit=+bulb#p310376
Regards
Paride

Thanks Paride,
The one thing I dont get is why there is no direct light under the lights in AO. It's not like it is a bounced light. this is direct light from the light. And it works in difuse mode/pathtracing but not in AO mode. Anyway otoy can improve this in the future?

coilbook wrote:It's like AO light does not shine well.
unfortunately rendering animation with pathtracing in the city full of lights is still impossible. Please look into AO , please add a cheat where ao light can shine better on objects. I think it is an old bug or that's how AO was coded.

Just curious, does the AO distance will change the effect?

jimho wrote:

coilbook wrote:It's like AO light does not shine well.
unfortunately rendering animation with pathtracing in the city full of lights is still impossible. Please look into AO , please add a cheat where ao light can shine better on objects. I think it is an old bug or that's how AO was coded.

Just curious, does the AO distance will change the effect?

No. It doesn't work. It's a mystery why direct light has a proper light on the ground but AO light disappears more light sources you have unless you crank light power to like 5000-10000

I find myself sometimes cranking up the lights a lot as well, but end up increasing the exposure.

Are you using the right imager settings? Sometimes I notice that if I don`t have that set up correctly, I end up eyeballing it with intense lightpower, which afterwards needs to be corrected again.