Hướng dẫn Setting VraySky và VraySun.
1. VraySky and VraySun In Vray 1.5 you can find new map "vraysky" and new light "vraysun". This two things will make your rendering much easier. With this feature you will be able to set up reality exterior lighting. It also can be used in interior lighting. I will explain how it works on one of building from archmodels vol.17. Settig up of sky and sun is very easy. You just need to get new material - Vraysky in your material editor. (Just select one of the slots in material editor, use Material->Get material and select Vraysky). Now create vraysun (you can find it in vray lights section), and put in the scene one vrayplane, so it will be our ground. In this step you must go to options of vraysky map, and turn on "manual sun node". And now you can select your sun node, just click on "None" button and point vraysun. Now go to rendering -> environment. Turn on Use Map in Background section and select map by clicking on button below. Now in Material/Map Browser select on the left Browse From: -> Scene, and there you can see created few whiles ago vraysky. So select it and in new popup window choose instance. Next thing we need to do is to create vraycamera, this is very important, becouse without this type of camera we wouldn't get options like ISO, shutter speed, f-number. This is how the building looks from camera angle: Now turn on GI, I wouldn't describe settings now, becouse it will be in other section, but in shortcut i used QMC + LC, and HSV exponential as color mapping type. Just look how it looks for now. As you can see this image is overbrighted. All you need to correct it is to change camera settings. Set f-number on 7,0, shutter speed on 45, and film speed(ISO) on 50. And here we got. But look at it, its don't realy this what we want. Now we need to do some adjustments. Change VRayPlane material to a bit darker. Now in vraysky, and vraysun change sun turbidity to 6, and sun ozone to 0,25. This is almost everything. Now we need to use an vray frame buffer for color and levels correction (it is described in vray frame buffer section). And final results 2. Color mapping In this section i will say something about color mapping. As you can see there is 2 new checkbox buttons in color mapping: clamp output and sub-pixel mapping. This animation shows that how this works And this is very importat to turn this two functions on. Becouse every light in your scene will be sharp, and every reflection/reflaction of this light will be also unantyaliased. Here is sample. Image on the left is without this functions, and on i turned them on. Well and here is the same image, but with linear multiply type of color mapping: with exponential: and Reinhard. Reinhard with burn: 0.0 Reinhard with burn: 0.2 Reinhard with burn: 0.5 Reinhard with burn: 0.8 Reinhard with burn: 1.0 [...]...Now turn on GI, I wouldn't describe settings now, becouse it will be in other section, but in shortcut i used QMC + LC, and HSV exponential as color mapping type. Just look how it looks for now. As you can see this image is overbrighted. All you need to correct it is to change camera settings. Set f-number on 7,0, shutter speed on 45, and film speed(ISO) on . 1. VraySky and VraySun In Vray 1.5 you can find new map " ;vraysky& quot; and new light " ;vraysun& quot;. This two things. material - Vraysky in your material editor. (Just select one of the slots in material editor, use Material->Get material and select Vraysky) . Now create vraysun