photons and glass

[SgWRX]

i have a window and i noticed when i set GI to on, max. num. of photons per sample set to 1 i see no photons except a few around the frame of the window which appear to be on the outside-side of the window. i have the windows object properties unchecked for cast shadows. if i hide the window, i can see the photons when i render.

 

what did i miss? you can't shoot photons through a window? the material for the window is a multi sub object with arch & design glass (thin walled) template. the main light is a mr area spot. 40000 avg gi photons per light.

 

thanks

[Justin Hunt]

chack the objects mentray properties and uncheck generate photons.

 

Generally though if you are using an Arch&Design shader (which I recommend) it has a photon shader built in thus telling mr how that surface will react to photons.

 

If you are not using a A&D or mr shader then drop a photon shader into the photons slot.

 

HTH

 

JHV

[shaneis]

Have you connected the photonic attribtes to the material to allow the photons through? On a similar note, photons will pass through the "glass" just as they would in the real world - except in the case of caustic photons.

[Justin Hunt]

quick draw shaneis:p

 

JHV

[SgWRX]

thanks both. will try this tomorrow. gotta get some sleep.

[shaneis]

quick draw shaneis:p

 

LOL, guess so! Just hoping I was somewhere on track! See you at the next corral?