Autodesk 12812-051462-9011 User Guide 3 - Page 271

Blur / Defocus (Distance Blur) group Blur Offset is similar to blur offset on page 7928 for bitmaps, while Defocusing is based on distance. Blur Offset Affects the sharpness or blurriness of the reflections or refractions without regard to distance. You can use Blur Offset to soften or defocus the details of a reflection or refraction. The value is specified in pixels. Default=0.0. TIP The default Blur Offset setting usually produces good results. If you see aliasing in reflections or refractions, increase its value in increments of 0.5 until the aliasing goes away. Blur Aspect This is an aspect ratio that changes the shape of the blur. Usually you will not need to change it. Default=1.0. TIP If you see aliasing that occurs mostly along horizontal lines, try increasing Blur Aspect to 1.5. This changes the shape of the blurred effect. The reverse is also true. If aliasing occurs mostly along vertical lines, try decreasing Blur Aspect to 0.5. Defocusing Defocusing is a blur based on distance. With Defocus, objects near the surface are not blurred, but objects farther away are blurred. The rays cast are spread as they leave the Raytrace material object's surface. Default=0.0. TIP Increasing the value of Defocusing can give a good distance blurring effect. Small adjustments are usually adequate. Try starting with a value less than 0.1, and increase or decrease it as necessary. Also try adjusting Reflect Falloff in Raytrace material or Attenuation in Raytrace map to get the best distance blurring effect. Defocus Aspect This is an aspect ratio that changes the shape of the defocusing. Usually you will not need to change it. Default=1.0. Architectural Material The settings for an Architectural material are physical properties, so it provides the greatest possible realism when used with photometric lights on page 5005 and radiosity on page 6168. With this combination of features, you can create lighting studies with a high degree of accuracy. It is not recommended that you use the Architectural material with standard 3ds Max lights in the scene, or with the Light Tracer. The point of this material is to provide accurate modeling. Use it with photometric lights and radiosity. 5526 | Chapter 19 Material Editor, Materials, and Maps