+ TRANSFORM = SHADER + 1,
+
+ /**
+ * @brief Enables/disables premultiplied alpha.
+ * The premultiplied alpha is false by default unless this behaviour is modified
+ * by the derived Visual type.
+ *
+ * @details Name "premultipliedAlpha", type Property::Boolean.
+ *
+ * @note Optional.
+ */
+ PREMULTIPLIED_ALPHA = SHADER + 2,
+
+ /**
+ * @brief Mix color is a blend color for any visual.
+ * @details Name "mixColor", type Property::VECTOR3 or Property::VECTOR4
+ *
+ * @note Optional
+ */
+ MIX_COLOR = SHADER + 3,
+
+ /**
+ * @brief Opacity is the alpha component of the mixColor, above.
+ * @details Name "opacity", type Property::FLOAT
+ *
+ * @note Optional
+ */
+ OPACITY = SHADER + 4