Tiny-little-testscene-beast - fail to render properly

[Sascha Selent]

just noticed the system units of your file were in inches, and the display units in cm..

Yes, that´s true - and shouldn´t it be like this? Display-units is a simple translation of values - you say 10 cm, the system makes 3,937 inches. Modelling in mm as system units do lead to problems when extending Max´s possibilities. With system units in mm I´m not able to make a scene of 2 KM diameter... or isn´t this the case on Max64 bit any more?

think that lead to the DE settings I had not really doing anything.

Ouf, I do not understand this sentence (and I don´t konw what DE is)...

[Sascha Selent]

here you go. Its still not perfect but not bad for 2mins maybe?

Two minutes is a dream!

[peterguthrie]

By DE i mean detail enhancement, i normally set it at about 500mm (presumably through testing although it was so long ago i dont remember )

re: units youre right on all counts, but i meant it was screwing up my 'standard' settings that i tried on it.

[Sascha Selent]

units youre right on all counts, but i meant it was screwing up my 'standard' settings that i tried on it.

Okay, you have a fast machine.

Here is your setup rendered on my machine, camera corrected:



And here I brought it back to inches:



This has not too much impact on the render - I hoped that, phu!

I´ll examine the settings, especially the material and the color mapping. Seems that this does the biggest advantages.

Thank you very much.

Sascha

[Sascha Selent]

Some more examinations

Okay, here again Peters Version:



...in comparison to a version with IRRMAP Preset Very High...



(forgot to use the color-curves, therefore it´s a bit darker).

As you can see heavy impact on rendertime, but no impact on the result. So the IRRMAP is not the important thing, it´s definitely the LightCache.

Here a version with a slightly pimped LC (0,005 instead of 0,01):



The result is better, more detailed with few more rendertime.

Now: Do I know about LWF? Use color mapping with gamma 2.2, bring down every material color and texture down to 0,4545 gamma, that´s it? And it´s necessary to use HSV-Exponential or Reinhardt for color-mapping? Did I get this right? And the LWF-check in SP3 will do th material-correction automatically?

So I´m on a good way to understand things better. Thank you all for your suggestions...

Sascha

[pg1]

this should help with lwf

http://www.chaosgroup.com/forums/vbu...ight=autogamma

The script simplifies the process for LWF until we can get our hands on SP3 which will have a LWF button.

I explain the workflow on the 3rd page of the thread

[dlparisi]

I adjusted Peter's scene a little (sacha's link at the top had different windows ?)...
-turned off DE
-adjusted the Imap a little
-lowered the LC to 1000 and turned off "store direct light" (this was giving you some odd highlights at the window sills).

I think I left everything else the same. Rendertimes are from a C2Q 9550.

[Sascha Selent]

I adjusted Peter's scene a little (sacha's link at the top had different windows ?)...
-turned off DE
-adjusted the Imap a little
-lowered the LC to 1000 and turned off "store direct light" (this was giving you some odd highlights at the window sills).

Woah, looks very clean! I´ll check it out right now!

Yeeeh, the windows aren´t different, but the camera. The VRayPhysicalCamera behaves very different in different world-units...

"turned off 'store direct light' " - ouf, seems that this has also heavy impact - I never dared to play with this because I do not know what it does .

Here is my last try:



This is what I call perfect - high rendertime, but perfect...

What I found out is switching the LightCache from 8 passes to 2 passes saves a lot of memory - this way I was able to use much higher settings on the LC without crashing Max.

Now I´ll check your settings, dlparisi...

...back in some minutes...

[dlparisi]

Yeeeh, the windows aren´t different, but the camera. The VRayPhysicalCamera behaves very different in different world-units...

I needed the Clone.dlm plugin which Peter was not using... Looks the same now.

[Sascha Selent]

I needed the Clone.dlm plugin which Peter was not using... Looks the same now.

Ooops, yep...

[Sascha Selent]

I adjusted Peter's scene a little

...and I adjusted it a little more...

Here dlparisis settings:



Veeery good and even on my machine very good rendertime.

And here I pimped the LC a little:



Again perfect with very good rendertime...

That´s f****** amazing...

dlparisi: Thank you very much, the "store direct light"-option was a very good hint!

So I´m happy, if someone can optimize this even more - I´ll go completely mad!

Sascha