When a texture map representing an uneven surface is applied to a flat polygon, the surface appears to get flattened.
当使用材质贴图在光滑的多边形上表现一个粗糙的表面时，那个表面看起来像是平坦的。
For the plum blossoms, I often use a slightly purplish red to sketch them out in uneven thickness, also done in flat acrylic strokes.
梅花我通常用浓淡不一，偏一点紫的红色来描绘，同样也是丙烯平涂。
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