Was it the plasticity or was it the chiaroscuro?

是可塑性还是明暗处理?

It was dusk: the contrasts of the colors were fading into a vibrant chiaroscuro; the lunar fields and woods were now just barely visible contours on the taut surface of the shining globe.

黄昏已经来临，颜色的对比逐渐退化为黑白两色。月亮上的田野和森林现在只是这个闪亮的星球的光滑的表面上隐约可见的轮廓。