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Thanks for your advice.
This image will probably be worked on some more in the next few weeks, since the customer wants to change / add some stuff about it.
And I have other interior renders of the same kind to do (the other rooms in the chalet), so your advice will sure come in handy
I'll keep you updated, cheers and thanks again !
M.

Hi madcoo,

I have the same trouble with multiple interior lights.

It seems Octane is not able to handle them well. As opposed to an HDRI or OctaneSun environment that render brillantly.

I discussed this in my topic here:

http://render.otoy.com/forum/viewtopic.php?f=9&t=32273

Maybe it helps...

Thanks Reality4, I read your topic and indeed there is some helpful info that I could use.
I love OctaneRender and have been using it for years now, but I have to admit that I'm thinking about switching to VRay for indoor scenes with lights, as Octane has got lots of trouble with rendering lightsources...
Thanks for your help !

Another thing I have done in the past is render the ambient pass in Octane

then camera-mapped this image back onto the geometry and rendered out a lighting pass using Vray

kinda works, same as before, black environment etc

Thanks for that tip!
Indeed applying the rendered image without light to the whole geometry (flat "face-to-camera" UV-map?), then re-rendering it with lights is not a bad idea!
I'll try that too !
Thanks !

yep, you need the original camera of course (with no lens shift in Octane), and also you have to match the exact resolution of the rendered image

what I do is xref the original geometry into a new file, merge in the original camera, then add lights etc, and in VRay, use a global override material, with its diffuse map set to be the rendered ambient png or whatever from Octane, using the 'camera map per pixel' map... play around with the exposure etc - this way, you can still 'batch' everything to render overnight

downside is you don't get the feature 'lights' or feature lighting reflected into anything shiny, and any bloom or glare from Octane

I guess you could do a third render with a shiny reflective material override, if you really needed this, and then generate a mask for anything chrome or glass etc, etc

bit fiddly...

other downside is you can't use an lens shift in octane, otherwise, you'd never be able to match the camera in Max, so for your classic interior shot with vertical shift, you have to render the whole thing with the horizon in the middle, if this makes sense, crop it all later in PSD

If you were really thinking of going back to VRay, could maybe check out Corona also?

this isn't directly related, but shows the general idea hopefully - although this was all done in Octane

with the camera mapped method, forgot to mention you should probably do an ambient render just lit with a white environment, so its all neutral to begin with, and use that as your camera mapped image for your lighting pass.. could be rendered half res I guess..

I am working with Neat Image photoshop plugin to reduce the noise and it works really fine.

-Juanjo

Thanks for the detailed explanation !
Looks great indeed !