Light Cache is a special method which can quickly calculate many bounces of light but it is not extremely precise. It cannot be used for Secondary Rays engine. It is suitable for Primary Rays engine in most cases. It is faster and creates very accurate results but it requires a pre-pass. Irradiance Map is an adaptive version of the Brute Force. It may be used for Secondary Rays engine but mostly in exterior scenes where GI light doesn't bounce many times. It is suitable for Primary Rays engine when we need high precision. It doesn't require a pre-pass which allows us to use it in Interactive Rendering. In this step, we explore the different methods for calculating GI with V-Ray.īrute Force is the most precise of all the GI methods in V-Ray.
This introduces direct light into the room which makes the calculations much faster and improves the quality of the final render.
#Vray for sketchup exterior rendering windows#
If we put these lights outside the windows V-Ray will sample the color and intensity of the sky and use those values to emit light from the Plane lights. When in this mode the color and intensity of the light is determined by whatever is behind the light. We can go around that issue by using a V-Ray Plane Light with the Portal Light option enabled. This means that a lot of the light is bounced or secondary light which requires a lot of GI calculation. In day time illumination of interiors, the light usually comes from the environment, through the windows into the room. In this step, we use Portal Lights to improve the illumination in our scene. This model allows us to control the intensity of the sky separately from the intensity of the sun using the Horizontal Illum. parameter which gives us more control over the overall illuminationįinally, we increase the suns Size Multiplier to create softer shadows. We can use the Vertical Tilt option of the camera to adjust the rendering and create 2-point perspective.įor this scene, we switch the Sky model to CIE Clear. This however results in some perspective distortion. In the case of an interior rendering we might need a wider camera lens to capture more of the room. We can also adjust for the sun's warm color by using the White Balance option of the Camera. We fix that by adjusting the Camera Exposure Value(EV). Since light is coming through the windows it is not enough to properly illuminate the scene as it is. We start by adjusting the V-Ray Sun and Sky system which is the main source of light in our case.
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