What’s your result with the Corona Benchmark?
Just out of curiosity to have a comparison time, I want to do a similar test and check your speed becasue I think it’s a bit slow and I have a different feeling here, I’m not working yet with such complex scenes but my simple interior scenes are fast, so I’m a bit confused with what I see 
Cheers.
Your render times in your scene are very weird IMHO, specially after seeing your benchmark results 
Try to see what happens if you remove all teh textures, leave the materials intact except for the textures, remove them, and remove also the HDR and any light source and start the lighting from scratch.
Also another test could be to put an override material with a simple grey, and try to render it.
About the vRay HDRI, the thing is that that is a Vray map, so maybe it’s doing something weird for corona under the hood, so use a standard bitmap (just my opinion, I’m not sure this is interferring at all)
But it’s obvious that there is something weird in your scene
If you can share your scene (or better, a reduced version of it that suffers the same problem) we can try it, I think you’r scene is rendering too slow for your system.
Cheers,
This is definitely not it, so far it’s been completely sound to use VrayHDRi bitmap loader, which is vastly superior to default MaxBitmap not only through its controls (360degree, various gamma alteration modes,etc..) but also with its re-sampling methods (bilinear,etc.. compared to pyramidal,summed…), although the latter, might not be beneficial in Corona.
In all my works with Corona I used only VrayHDRi. Since I use very hi-res maps (up to 24 000px) I use the resolution multiplier next to light samples even down to 0.1 and lower. I am not sure if this “sIBL” sort of thing provides better noise convergence, I never tested, but I neither experienced any problems at all.
It works as tone-mapping, compressing the highlights. Clamp affects dynamic range of the ouput. Two absolutely different things.
Regarding light portals, I also use them very rarely. They help greatly with noise, but only in certain conditions where the interior space has very limited access to environment.
Definitely not a must.
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It works as tone-mapping, compressing the highlights. Clamp affects dynamic range of the ouput. Two absolutely different things.
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You are right! Cheers 
This is more in line with what I could expect from your computer
Tell us here what material was the problem when you reach to it please.
Cheers.
It was the blend materials (wood and wall materials), were the culprits. Just like the performance debugging page said for slow times. It is pretty amazing how drastic blends slow down corona. Easily by 50% or more when i added blend materials.. Even adding just my bookshelf wood texture added a good bit of time, leaving all other materials with a standard corona material… lesson learned! I wish there was a mental ray & maxwell material converter, which is what all our high-end scenes are done in usually.
Can’t wait for distributed render so I can see how my render farm of 100 cores would do!
There is one capable of converting Arch&Design mats but not maxwell materials http://forum.corona-renderer.com/index.php/topic,126.0.html
most excellent. Didn’t realize this same one did mental ray mats also. Thanks Deadclown
I’m also open for maxwell license donations to provide maxwell conversion support
Just kidding, but as far as I remember maxwell materials are kind of different to the average max materials with own maps and stuff, so I guess this won’t happen.
alpha6 is fast! Man, I am loving it now using my render farm.. I think this is one of the fastest distributed renders i have used now!
