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baffero
04-26-2004, 06:23 AM
for a project I am working on renders for an office. I am quite new to all this and am now working with radiosity.

I want the following: the windows in my scene should show clouds outside. I have used a backdrop image of clouds, but somehow I cant get it right. I have also posted all my settings.
What am I doing wrong??


http://www.student.tue.nl/H/B.A.F.Lenssen/test%20render%20met%20backdrop4.jpg

the glass here is obviously not showing through any clouds......

all my settings, lights and surfaces...


http://www.student.tue.nl/H/B.A.F.Lenssen/area%20light%20prop.jpg

http://www.student.tue.nl/H/B.A.F.Lenssen/backdrop.jpg

http://www.student.tue.nl/H/B.A.F.Lenssen/composition.jpg

http://www.student.tue.nl/H/B.A.F.Lenssen/composition2.jpg

http://www.student.tue.nl/H/B.A.F.Lenssen/illum%20properties.jpg

http://www.student.tue.nl/H/B.A.F.Lenssen/spotlight%20properties.jpg

http://www.student.tue.nl/H/B.A.F.Lenssen/surface%20settings.jpg



any help is much apreciated

:rolleyes:

hdesbois
04-26-2004, 10:16 AM
Not sure but...
Did you try to lower "diffuse" setting for your glass material? And luminosity I think would be better at 0%. Then, you can try lower reflexion settings (and a gradient map maybe) : usually, under normal light conditions, you don't get that much reflexion on the windows pane inside a room). Same thing for specularity. Just now I'm looking at a cloudy sky through my office's windows, and the reflection is only noticeable at very low angles (maybe 30).
Hope that helps!
HD

baffero
04-28-2004, 03:58 AM
turning down the relfection helps a lot, its quite obvious of course but you always have to hear it from someone else I guess....:p

this one is with render transparency off........
http://www.student.tue.nl/H/B.A.F.Lenssen/office without reflection1.jpg

this one is with render transparency on......
http://www.student.tue.nl/H/B.A.F.Lenssen/office without reflection2.jpg

the last render is with these settings:
http://www.student.tue.nl/H/B.A.F.Lenssen/reflection set.jpg


this is the part that I dont understand:
why are the windows with transparency OFF more clear???


thanks


bas

hdesbois
04-28-2004, 09:36 AM
I tryed to duplicate your material settings for glass, and I can't reproduce your problem:

hdesbois
04-28-2004, 09:45 AM
Sorry, I hit "submit" button before I finished. So, the above image is without radiosity. Rendering settings identical to yours. LightWave version is 7.5c, PC (win XP pro). One point light in the room, a distant light outside. Raytrace transparency off doesn't make any big difference.
I tried a render with radiosity, but I used Fprime, for lack of time. Monte Carlo, 50%, 8 bounces :
As you can see, no problem...
HD