specular alpha是什么意思

onunix

请问 specular alpha 镜面反射，和  透明的 加起来是什么意思？ 原文：
Flat shading mode. The color and specular component of the first vertex in the triangle are used to determine the color and

specular component of the face. These colors remain constant across the triangle; that is, they are not interpolated. The

specular alpha is interpolated. See Remarks.