Hi,
To compare rendertimes a bit, could you post the machine specs also?
If I set the AA and qmc to default, I get more noise than in your tests:
Any ideas what is wrong?
My settings:
Regards,
wouter
ok, probabely the default qmc of 1.46.05 is noise th=0.005 instead of 0.01
I’ve tried vlados settings and I still can’t get clean glossy reflection.
I would like to have the scene he set up to see what I’m doing wrong.
I’ve tried everything I can think of, and they still look like yours Flip.
Perhaps the build he’s using fixed the problem?
Oh, when I saved the lightmap using his settings, it was 547 meg.
Tony
For the large version of the image below, I used world scale for the lightmap, and a fixed filter.
Best regards,
Vlado
why world scale?
in the help file is written that screen is better for stills.
Flipside or Vlado if either of you could post your lightmap settings I know I would appreciate it. I have not gotten lightmap to be anything but very slow.
Thanks
yeah, I’d like the scene as well, vlado.
this was a great idea btw, wouter…
paul.
nice post,
please show the ‘adjusted’ scene vlado (if small enough), i think it will answer most peoples questions
thanks!
Of course I’ll post it, I just want to make a few more tweaks and make something like a short tutorial about it.
Best regards,
Vlado
excuse me VLADO maybe (surely) mine is a stupid question but…
Why u did a gi calculation of white solution first of all?
to mix with the gi solution with final materials applied to get brighter results and desaturate results?
has something to do with imap viewer mixing the 2 gi solutions (the first with white materials and the second with all amterials applied)?
or to test simply the scene to see better the artifacts?
thanks for your support (obviously GREAT support)
excuse my BAD english
bye
or to test simply the scene to see better the artifacts?This is the one reason. The other is that I wanted to adjust the lighting first, and it’s easier (and faster) without all the glossies and bitmaps getting in the way.
Best regards,
Vlado
thanks VLADO
bye
Very interesting topic !
Thanks to all
Gael
vlado: what rgb values has the white material used in the white solution?
Vlado, if I set lightmap to screen, will it be the exactly the same for a 800*600 or 1600*1200 image? or are there other things that influence the LM result?
wouter
more and more interesting this thread
good questions flipside I hope in positive answer by VLADO :lol:
bye
Please detach me from internet I have to works I can’t stop me to watch this forum those days 
vlado: what rgb values has the white material used in the white solution?(200,200,200)
Vlado, if I set lightmap to screen, will it be the exactly the same for a 800*600 or 1600*1200 image?Yes. It will be the same if you set it to world scale too.
Best regards,
Vlado
why do you use world scale when in the help file is written that screen is better for stills?
tia
why do you use world scale when in the help file is written that screen is better for stills?Because I wanted to compare it to the screen scale mode.
Best regards,
Vlado
ah, ok. 
thanks.
Here are my final tests (original 1600*1300 resolution)
dual xeon 2.8
1Gb Ram
no hyperthreading
1. HSV color mapping 2/2
LM calculation ±12 minutes
IR map ±20 minutes
(rendertime on image includes this time also)
full resolution image, straight out of max click this link: http://users.pandora.be/stor1/vray/full\_res\_02.jpg
A bit of post in photoshop:
settings for this image:
2. Linear color mapping 1/1
LM calculation ±20 minutes
IR map ±12 minutes
(rendertime on image includes this time also)
All other settings the same, except for lightmap:
subdivs=2500
size=0.005
screen
NO filters
full resolution image, straight out of max click this link: http://users.pandora.be/stor1/vray/full\_res\_01.jpg
A bit of post in photoshop:
So in example 1 I used less subdivs for LM, LM went faster but IR map slower. Results of GI quality look the same, except under the curtains. Probabely using 2000 subdivs without any filtering will work best, need to test that too maybe.
When using adaptive QMC as image sampler, you need to use high subdivs for glossies, which influences rendertime much less than with adaptive subdivision. If you use ad subdivision, lower all glossies to 10 and subdivs for area light also, otherwise it’ll take forever to render!
My initial test with qmc in second bounce were 3H rendertime, and glossies were worse and GI looked terrible… So this is a pleasing result for me.
Wouter
Nice tests Wouter. So it seems that for these type of scenes adaptive qmc is the way to go. (that’s also in the manual, but it is good to see a real example)
Side note: the first image shows clearly why I dislike HSV colormapping so much. Parts that ought to be white become fully saturated. Exponential corrects this with the disadvantage of desaturating the whole scene. I like the linear version the most, despite the blown out area. It feels more natural.
P.S. to Vlado: wouldn’t it be possible to make a color mapping mode that preserves saturation in not blown out area’s, or would that look weird. It just seems that neither of the current color mapping modes can adjust the image to what a human eye would see
