maxwell vs kray first attempt

[albertos2008]

hi to everyone..
kray is amazing..

I've tried a fast test using maxwell and kray with the same scene..
my objective was to keep very small changes between the two settings...

here my rules...

illumination:
only white luminous polygons behind the windows, in maxwell they are emitters, in kray i've turned luminosity to 500%

materials:
in maxwell I've used wizard for transparent and reflective materials, all the rest (walls and ceilings) was basic diffuse white material
in kray I've played with gradients and reflection blur

global settings:
on maxwell, just click "render" , on kray I've used some basic settings found in this forum..

the results (NOTE: I've used different floor texture so color has changed...)
maxwell: 10 hours rendering.. a little bit of noise.. smooth image.. perfect refraction.. very realistic reflections..
kray: 30 minutes rendering!, sharp image, nice reflection.. BUT very non-realistic refraction..

so... I think the winner is kray.. but..

here's my question... how to improve glasses?..
the air polys tweak works also in kray?

thanks to all.. and sorry for my english..

[ana028]

I think that your glass isn't good setup in lw. There are some splotches in the places with indirect lighting.

Remove your airglass objects if you have it and used this surface for glass objects.

http://www.kraytracing.com/forum/download.php?id=1831

[Janusz Biela]

Nice.
You can share this scene?

[albertos2008]

thanks ana028...
this is the new glass results... for me it's good...

johny.. I've to clean a little bit the scene after I can post it..

thanks

[larry_g1s]

Wow albertos2008, very nice.

[albertos2008]

thanks..
now I'm trying to understand hot to put backdrop image to light the scene with no big color dominants...
here I've front mapped the luminous poligon behind the windows...

other things..
-the water on the floor near the bathtub is too "flat"
-I want to put a white courtain on the window, but I've no idea for the material settings...

[Janusz Biela]

thanks..
now I'm trying to understand hot to put backdrop image to light the scene with no big color dominants...
here I've front mapped the luminous poligon behind the windows...

other things..
-the water on the floor near the bathtub is too "flat"
-I want to put a white courtain on the window, but I've no idea for the material settings...

Backdrop is easy:
Try use plane backdrop with texture + 20-50% diffuse (becouse luminescence + UNSEEN BY RADIOSITY no work ideal - I mean this still make light from lumi surfaces and splotches - BUG) Ofcoarse You must turn OFF Self shadows, received shadows, cast shadows.

water need bump from PROCEDURALTEXTURE (maybe turbulence) (try use FPrime to check how much bump and size)

For courtain use thin box transparency + translucency (but no strong becouse translucency make long renders) or transparency + very small bump and refraction index.

[3dworks]

very interesting test, thanks for posting this!

as for the maxwell rendering: not sure why at this resolution you see stuill noise after 10 (!) hours... on a recent 8 core at 2.8 ghz i would guess after 2 h the image should be done...

did you try to use sky dome (instead of physical sky) with sunlight? this speeds up enormously the rendering. also, make sure no material has a 255 RG or B value in 0 degree reflectance. a value of maximal 235 should be used here, it speeds up again rendering a bit (because generating less noise). tip: the recently released version 1.7 speeds up a lot rendering when using the new physical sky, so this might be worth a try as well.

nice scene anyway, and good renderings on both engines!

cheers

markus

[albertos2008]

Backdrop is easy:
Try use plane backdrop with texture + 20-50% diffuse (becouse luminescence + UNSEEN BY RADIOSITY no work ideal - I mean this still make light from lumi surfaces and splotches - BUG) Ofcoarse You must turn OFF Self shadows, received shadows, cast shadows.

thanks johny, but I'm trying to use only luminous poligon to light the scene (I don't like direct sunlight.., and I love the paradox to recreate ARTIFICIAL light as a REAL photographic studio)
so I've to map the backdrop image directly on the windows panels
in my last image the result was good but too "blue", I've used diffuse 0% and luminosity 500% photon multiplyer 5..
now I'm trying the same thing on a different scene...

3dworks
did you try to use sky dome (instead of physical sky) with sunlight? this speeds up enormously the rendering. also, make sure no material has a 255 RG or B value in 0 degree reflectance. a value of maximal 235 should be used here, it speeds up again rendering a bit (because generating less noise). tip: the recently released version 1.7 speeds up a lot rendering when using the new physical sky, so this might be worth a try as well.

yes I know how to speed up maxwell... I never use physical sky or skydome.. I use only poligon emitters (in both maxwell and kray)
but on maxwell I've "cooked" and image for days but some noisy areas remains.. on kray the images are "sharp" everywhere.. soon I will test the 1.7 release with the new features...