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Global Illumination... About Truespace Archives These pages are a copy of the official truespace forums prior to their removal somewhere around 2011. They are retained here for archive purposes only. Global Illumination... // New Users 1  |   Order by default Post by maxd // May 16, 2007, 8:06am maxd Total Posts: 28 Hi, messingl with global illumination in vray.. has anyone any good suggestions to a good light setup adnl settings to avoid the over lighting when rendering... i tend to delete the viewport lights and add my own... but would appreciate somel pointers in using this great renderer... thanks Tony Post by splinters // May 16, 2007, 8:15am splinters Total Posts: 4148 Start with no lights in the scene...will render black in LW but Vray GI is a global light source. I am no Vray master but I get nice results with one shadow casting light (area, omni or infinite) set pretty low and GI with either an image (for HDRI effect) or simply grey colour for ambient lighting. Here is an image with the GI set to a dark grey/orange colour and one yellow omni light to the right of the face...nothing else. Post by splinters // May 16, 2007, 8:17am splinters Total Posts: 4148 And as you mentioned over lighting...here is creative use of just that. Post by maxd // May 16, 2007, 8:22am maxd Total Posts: 28 thats cools splinters... i was using only 1 light, got that nice GU feel to it then.. like the use of the 'overlight' effect there, something to remember in the future... does anyone really use the 3 point light setup with GI...?? Post by e-graffiti // May 16, 2007, 3:05pm e-graffiti Total Posts: 171 The 3 light setup is the basics of understanding lights and how they are used. In real world (and in CG) 3 point lights are used mainly to light a "subject" and not a whole scene and is very much still useful. GI is used mainly to light an entire scene, then there is the combination. So the light setup depends on what you are trying to achieve. Post by Jack Edwards // May 17, 2007, 5:07am Jack Edwards Total Posts: 4062 GI replaces a lot of the need for 3 point lighting. For example you no longer need the fill light and bounced light helps with rim lighting. Basically I just use key lighting for my GI scenes. 2 tips to avoid over lighting: 1.) If it's bright enough in Workspace it's too bright in VRay with GI. You have to account for the extra light that the GI solution will be adding to the scene and each light adds bounced light to that solution. 2.) Use darker lights (grey instead of white) and envirionment settings (dark grey) or stronger fall off -- attenuation. -Jack.

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