What are some rules to keep in mind when creating naturalistic scenes?
What will be an ideal response?
Computer graphics tends to be just perfect. In fact, CAD models and technical-engineering animations are frequently too perfect. Experienced animators keep some of the following rules in mind when they create lighting and materials for a scene:
• There are no straight lines or edges in nature. For CAD models, one useful method is to include as many fillets, rounds, and chamfers as possible to soften the appearance of impossibly sharp edges on parts.
• The real world is dirty. When creating textures for object surfaces, throw in a few smudges, smears, and surface imperfections using noise filters and specular, bump, and reflection maps to mask the perfect surface appearance of solid colors.
• Shadows are not all created equal. Avoid impossibly black or improperly colored shadows. Adjust shadow density and edge softness so that bad shadows do not detract from the scene.
• We do not live in a vacuum. Create some atmosphere. Selective use of filtered fog and volume lighting with image projections can add a more believable quality to the scene.
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