Autodesk 507B1-90A211-1301 User Guide - Page 323

Add and Position Lights Lights and light studios can be taken directly from the archives and applied to the model by simply dropping them into the palette. These can then be repositioned as you need. The Recommended archive contains five lights (Ambient, Distant, Eye, Point and Spot), a Standard Light Studio, an Environment Light Studio, an Environment folder containing two Environment lights utilizing HDRI-based light sources (see "Image-based Lighting" on page 317 for more information), and an Exterior folder, that contains three light studios for different city locations around the World (Clear Sky, Overcast Sky and Sun Study). If you are creating an external render of a building, for example, then you may find that one of the Environment light studios can give a very realistic effect, using Image-based lighting to light the model. Alternatively, Exterior light studios may give you the effect you require. These do use physically accurate lights however, which generally take longer to render the scene. Alternatively, you may prefer to use the Standard Light Studio as a starting point and build up your lighting from there, adding combinations of the basic recommended lights to create the desired effect. The Standard archive contains a Default Eye Light studio (which is effectively rendering with a head light); a folder of Exterior light studios which predominantly consist of studios that use a number of lights to replicate the effect of a Sky light. Not using physically accurate lights means you don't have to turn on Auto Exposure (see "Auto Exposure" on page 327) which can negatively impact on the basic recommended light settings; a folder of Interior light studios for use in internal scenes; a folder of Object light studios which are best suited to lighting smaller models, such as a vehicle or piece of machinery, for example; and a folder of Projector light studios, which can be used to project an image onto an object in the scene. The Templates archive contains all of the basic light shaders that are available. These can then be edited (as can all lights) to create the exact lighting you require (see "Edit Lights" on page 313 for more information). To add lights to the model 1 Open the Presenter window, and click the Lighting tab. 2 From one of the archives in the left-hand pane of the Lighting tab, choose the light you wish to add to the scene. 3 Drag the light and drop it into the palette (right-hand pane of the Lighting tab). This will automatically be added to the scene. NOTE If you drag a light studio into the palette, this will replace any existing lights with those that make up the light studio. As a general guide, the more lights there are in a scene, the longer it will take to render it photorealistically. For external rendered scenes, you may consider using the Standard Light Studio, (from the Recommended archive) as a starting point, then strategically add a couple of Point and Spot lights around the scene. Point lights are good to light up a dark area of the scene, whilst Spot lights can add an element of drama and enhance realism. Add and Position Lights | 311