FREE Vray Tutorial - Global illumination. The easiest engine is the 'brute force'. As the name already suggests, it requires brute force to calculate the lighting. This method computes the GI in every single shaded point. So even on very flat surfaces where lighting is very even, every point will be calculated. This is of course very slow, but also very exact. The image below is lit with Vray's skylight. Think of this as a real sky illuminating the scene. I rendered the image below with the default values for the engine. The second image is with brute force subdivs set to 16.
The third image has subdivs=32. To summarize, if you have a powerful CPU and enough time to wait, brute force is an easy and very high quality GI engine. V-Ray ambient occlusion through glass. When calculating ambient occlusion, transparency is ignored completely. This means that anything positioned behind the transparent object is not visible within the ambient occlusion pass. Most methods for generating ambient occlusion suggest that you hide all your transparent objects before rendering. In V-Ray 2.0 you can use a method that will allow you to ignore certain objects. This will generate an ambient occlusion pass that is visible behind transparent objects without having to hide anything in your scene.
In the render elements window add VRayExtraTex. VRayDirt is a texture that applies a colouration to the edges of objects; this is useful for simulating dirt or in this case ambient occlusion. Tick work with transparency and then in the exclude option choose all objects within your scene that are transparent. Under refraction set the affect channels to all channels for all the transparent materials in the scene. Simple VRAY Matte/Shadow tutorial. 360° panorama using 3dsmax 2010 and vray 1.5 sp3. Vray > Color bleeding. This time ill show you a couple ways to get rid of the color bleeding in Vray. First of all what is color bleeding? Well color bleeding is an effect of the GI bounches in vray so that the bounched light also bounches color. so for examples if you have a white room with an red floor. the whole scene would look redish. somethimes this is a effect we want, but not always.
So there are a couple of ways to deal with these. Before we begin, lets show our start image : As you can see we have a simple scene you can download it here:StartScene This contains a Floor, a Wall and a Ceiling and a direct light And rendered using Very low settings for IR and Lightcashe So lets change the floor color to a red one (RGB 255,0,0). and render it. So here is the result: As you can see Whowwww red So that is a perfect example to show you a couple of ways to correct this: Methode 1 : Adjusting the GI saturation first is changing the renderer. in Vray goto the “Indirect Illumination (GI)” tab. Now render this one….