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Vue F.A.Q (Last Updated: 2024 Dec 30 8:14 pm)



Subject: Serious problem with "fake" Radiosity. Help needed


JDWohlever ( ) posted Wed, 05 February 2003 at 2:18 AM ยท edited Tue, 14 January 2025 at 6:12 PM

file_44590.jpg

Ok, the problem: I use a default scene with no atomsphere, sun is deleted. I then make half dome of 160 radial lights. I make a "room" with 100 pure white walls. 100% diffuse, no ambiance, no reflection, and no luminous. Lets call this -TextureA. I then bring a model (in this case a 4 wheeler) and paint it the same color of the walls with TextureA. I make sure the radial light dome is within the walls, and above the floor. Next I set the power of all lights to 25 and all lights have shadows. Now I render. I get a nice "faked" radiosity effect. However the shadows are too defined. So next I click on Shadow Soft. Now this is where the problem comes in. If I turn shadow softening on my image will no longer have just white, but a pink hue to the entire image. I have tried all softness settings from 1 to 45 and it doesnt matter. As soon as softness is turned on the white light becomes a pink shade. I have attached a sample render with soft shadows on and off. Came someone please explain this and any solutions I might try? I have tried this same set-up with Bryce 5 and it does not have this "pink" problem. Thanks for any help


MightyPete ( ) posted Wed, 05 February 2003 at 3:23 AM

Check in the atmophere editor. make sure that the part. Auto decay sunlight color is off. Or on the sky tab there is another spot that can give you a weird pull the color toward pink then the fog tab is one more place that could be giving you that problem set thos to 0. Finally the last tab. Effects. Check the all other light spot and the sun spot. It probibly coming from color shift. Turn that off. The other place it could be coming from is lens flare. Turn all that off too. It's easy to find just look around and turn off everything that looks pink or red. It's bleeding in from the default settings and the amount of lights you got happeneng there.


gebe ( ) posted Wed, 05 February 2003 at 4:22 AM

If what MightyPete says doesn't work, go in the material editor, click the EFFECTS tab and push LUMINOUS to 30 or more %. Do this for all white materials you used. Guitta guittalogo.GIF


YL ( ) posted Wed, 05 February 2003 at 5:34 AM

Strange, I never saw that with Vue2.1. You can also check in the material if there are red highlights, but I suppose it's not the case. Yves


JDWohlever ( ) posted Wed, 05 February 2003 at 1:11 PM

Well, I have checked the following: In the atomsphere, first of all there is no sun as I deleted it. There is 0 fog, 0 haze, sky color and all other colors are 100 white. No flare, no colorshift, no decay. On the radial lights I have no flare, just pure white light. Same effect. Adding the 30% lum setting only washed out some of the pink but where shadows darken the pink is still there. Im totally baffeled. If someone out there can use a radial light dome with soft shadows that does not have the "pink" effect, can u please send me the scene file so I can compare? Thanks


JDWohlever ( ) posted Wed, 05 February 2003 at 1:13 PM

And interesting update. The pink is coming from the radial lights. It seems the more lights youadd the pinker it gets. I started with 1 light and started adding one at a time. When I got to 20 lights I started noticing a shift in the colors toward blue.. As you add more the blue shifts toward red.. ??


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