fill() also sets the ambient color (as the old P3D used to do)

java/libraries/opengl/src/processing/opengl/PGraphicsOpenGL.java

@@ -4079,6 +4079,22 @@ public class PGraphicsOpenGL extends PGraphics {
     this.strokeCap = cap;
   }
 
+  
+  //////////////////////////////////////////////////////////////
+
+  // FILL COLOR  
+  
+  
+  protected void fillFromCalc() {
+    super.fillFromCalc();
+    
+    // Setting the ambient color from the current fill
+    // is what the old P3D did and allows to have an 
+    // default ambient color when the user doesn't specify
+    // it explicitly.
+    ambientFromCalc();
+  }  
+  
 
   //////////////////////////////////////////////////////////////