1. 衰减贴图：我列出的材质都是使用了光线追踪材质(Raytrace),通过对固有色通道(Diffuse),反射通道(Reflect),透明通道(Traesparency控制折射),雾颜色通道(Fog Colcr模拟次表面透明),透明通道(Traesparency)的控制配合衰减贴图(Falloff)来实现效果.
2. 衰减区：为了很好地实现这一目的,可以分别调整这两盏灯光的聚光区(hotspot)和衰减区(falloff)大小. 聚光区是聚光灯最亮的照射区域,衰减区是聚光灯由最亮到无光的渐变区域. 至于图中的叠合区域,是背景光衰减区与主光衰减区重叠形成平滑照明的区域.
1. The Obama campaign's strategy largely relies on a strong performance in cities and suburban areas to make up for any falloff elsewhere in Ohio.
2. Obama led her by an even larger margin among independents, but he suffered from a falloff in turnout among young voters compared with Iowa.
3. But the mystery here is that the pregnancy falloff reflected in the government data began months before Wall Street's plunge last September.
noun
1. a noticeable deterioration in performance or quality
e.g. the team went into a slump
a gradual slack in output
a drop-off in attendance
a falloff in quality
Synonym: slump slack drop-off falling off