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silverlw
05-09-2005, 03:26 PM
Kraytracing the Photon/Irradiance/FG/Pathtracer
renderer for lw has undergone some heavy development
lately and im now happy to announce that latest beta
is available for everyone who wants to try it.
This major update is now a plugin for lw and
it now supports Subdivision and Gradients to name a
few of it features. For more information about this
renderer and download:
http://www.kraytracing.com/index.php?subpage=2&rid=32

Pavlov
05-09-2005, 03:38 PM
Kraytracing the Photon/Irradiance/FG/Pathtracer
renderer for lw has undergone some heavy development
lately and im now happy to announce that latest beta
is available for everyone who wants to try it.
This major update is now a plugin for lw and
it now supports Subdivision and Gradients to name a
few of it features. For more information about this
renderer and download:
http://www.kraytracing.com/index.php?subpage=2&rid=32

SilverLW, Kray archive seems to be corrupted.
Maybe it's me, but i downloaded it from 2 different PCs and it gives bad file on boht.

Paolo

silverlw
05-09-2005, 04:09 PM
some extra downloadlinks

http://www.kraytracing.com/index.php?subpage=2&rid=32
http://www.vizualizacije.com/kray/kraytracing_demo1_511.zip
http://hem.bredband.net/b223277/Kray/kraytracing_demo1_511.zip

silverlw
05-09-2005, 06:24 PM
Some advices to prevent the most common mistakes by those without any previous experience of a photonrenderer.

1. Kray is very well integrated into lw but works completly different than a montecarlo renderer so read the manual and do the tutorials.

2.Kray now renders all kinds of lights but only those with some falloff will cast photons. Objects with luminosity will also cast photons. Imageworld.p will work with Kray but only cast FG rays so to get an hdri or other image to cast photons map it on some geometry.

3. Procedurals dont work (yet) and kray should ignore them but sometimes they might lead to crashes so try avoid them as much as possible.

4. Build your scenes with Kray in mind to avoid problems. One bad example i have seen much of is that people tend to add sunlight with an arealight high and far away. When Kray starts shooting photons 95% of the light will not hit anything usefull wich leads to poor quality and longer rendertimes. The better solution is to use a spotlight with narrow coneangle and aim it at the window. Sunlight is straight and hard not "fuzzy" unless it's scattered by something like a curtain.
Use a square polygon or arealight outside the window to add ambient skylight rather than one large HDRI sphere outside the room. If a HDRI sphere is used it has the same problems as a distant arealight, it will shoot photons in all directions and only a few of them will come in through the window.

5. Dont use "Load recent scene" since that might lead to crashes for the moment.
Use normal "Load scene" instead.