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I uploaded two images in the first post which were made with subsampling waiting to cook for 9hrs aproximately for each

Hi joseph,

I still think you should fight a little bit more with rendering time. It's very important for future architect. So good thinks about your rendering are: colors!, design, your illumination is uniform (like in good interiors magazines). I don't like noise, bad model and material of curtains, bad model od windows.

See what I could do in 1 hour on GTX460:
- 6 IES lights
- oryginal 4096x2048 downscaled to 2048x1024
- Pathtracing
- hotpixel removal in Octane
- noise reduction in PS

So 1 hour and I have better quality and better resolution render than yours.

thank you for your comments and notices......
I agree about the curtains(they were quickly designed in rhino) and the windows are too simple too...
what I don't understand is the difference in render time.....
for a picture half of yours my gtx 470 needs 8hours and still some noise appears...
1. does it have to do with the triangles of the scene? (my scene 1,695,199tris) rendering with 0.46Ms/sec.....
2. does ithave to do with materials?
3. post production?
4. or am I doing something wrong?(does the scale of the scene has to do with render time or noise production?) I import from blender (meters to meters) and my door width is half of the blender's default cube side...
5. the number of IES? Ihave 20 in my scene....
P.S. nice image, realy like loft spaces

About the curtains - try one of these: http://resurs3d.blogspot.com/search/label/Curtains

1. So if you have lot of models in scene the render will take longer but just a litle. More importent are colors. White interios need more time than dark interiors because there are more bounces. So it's good to use 0.9 white colour (1.0 means infinite bounces).
2. Complicated materials can also make render very long. In my scene it was acid glass.
3. I always do color corection in PS because I can't get good efect in Octane.
4. I see that the scale in your render is very good so dont't change anything.
5. Numer of IES can make render longer, and also number of polygons emiting light. Try to do 1 polygon emiting light for 1 IES.

If you want - send me an image in 4x higher resolution done in 1 hour time. I'm very curious how it looks.

the link is very very useful ...... thank you!
1 very nice information about white materials....didn't know
2 the floor has normal map ,the curtains alpha image, some glossy materials but since I am not an experienced user I don't know how these affect.....
3 I also do to begin, and then adjust some filter or color balance if I want a color to be more significant
4 thank you I needed that to be confirmed
5 I disabled my IES but I had no difference at the render speed....

after some changes in the white material(set it to 0.9) switching of the IES ,playing with the window glass material, I saw no sugnificant chande in speed.....
conclusion .....the scene is heavy

the image is cooking at 4096x2600........I will upload it in an hour

thank you for answering to so many questions and for sharing the link

joseph wrote: conclusion .....the scene is heavy

Or your card isn't performing as it should be. You should run the benchmark scene to see what you get. It might be that your Quadro is somehow limiting your GeForce.

ok can not upload image my connection hangs.... so here is a puzzle 4096x2600 4 times bigger....0.56Ms/sec cooked 1 hour

rendering in 4096x2600 gives way much better quality to reflections...I was rendering at 2048x1300 and the reflections didn't appear at all.....

@GeoPappas

I haven't done the test, but there must not be a problem because with other simlier scenes the perfomance is good...
the problem is that with this scene I am impatient and as it seems I should have better results rendering 4 times bigger!

I did some tests with your picture and I get the result you can see in the link. I lost many of details so I am not satisfied.

I see that you are using a new feature - PMC. I would recommend you to use Pathtracing. PMC is still very bad optimized. They say that PMC is good to use in interiors but in my tests I get 2x or 3x faster rendering with Pathtracing. PMC is very good in some more complicated scenes but your scene isn't. You should save some 3 hours on that.

I have also a questions - have you got glass objects in windows? Can you delete curtains and see if it helped?

yeah it is imposible to clean after 1 hour cooking without losing a serious amount of detail....
anyway I have let it rendering till reached 1000samples (so 1000x16 will reach 16000 after downscaling),I will finish it and post it.
I used 2.46b so it is pathtracing....i am dying to try PMC but because of some deadline I don't want to risk placing new drivers(I am kind of slopy with this things)
I will do another test without glass material and without curtains or with curtains without transparency but later on because now I am loaded with another project...
the thing that I understood from all this, is that it is DEFINATELY better to render 4 times bigger thaan 2 times or original scale. I get much better quality and probably a very small increase in render speed!