Autodesk 12812-051462-9011 User Guide 3 - Page 2609

5 Click the intersecting object. Creases or Ridges Show in Boolean Objects Creases or ridges might be caused by a Boolean operation between an object that has very few faces and an object that has considerably more faces, for example, when you subtract a complex freeform object from a simple box. 3ds Max tessellates the surface of the box so there are additional faces for the subtraction. Unfortunately, the faces are usually generated as long, slivered faces that sometimes overlap and form creases or ridges in the resulting scene, when rendered. Before attempting the Boolean operation, try these steps. 1 Select the object that has the lower face count. In this example, it would be the box. 2 Change the Length, Width or Height Segments of the surfaces where the subtraction will occur. 3 From the Compound Objects buttons, click Boolean. 4 Perform the subtraction as you originally wanted. By subdividing the surface with more faces, the Boolean operation has more faces and edges to work with. This results in fewer long, sliver-like faces that can produce creases or ridges. Consecutive Booleans Results in Disappearing Components Booleans are programmed to work with two operands, Operand A and Operand B. If you plan to join or subtract many objects from the object that you've selected as Operand A, you must click the Boolean button after each Operand B selection. If you don't, and simply click the Pick Operand B button and pick the next object, the previous operation is negated and the previous Operand B disappears. The most efficient means to use when joining or subtracting a large number of objects to or from a single object is to attach all the objects before attempting the Boolean operation. As an example, let's say you're building a metal plate that has a circle of bolt holes. So far, you have a flat box, Operand A, and ten cylinders, Operand B, passing through it. 7864 | Chapter 28 Troubleshooting 3ds Max