--- a/Depth32Image.st	Wed Jan 24 22:11:41 2018 +0100
+++ b/Depth32Image.st	Wed Jan 24 22:14:00 2018 +0100
@@ -992,7 +992,7 @@
                     rRightBelow = sP[4+_width4];
                     gRightBelow = sP[5+_width4];
                     bRightBelow = sP[6+_width4];
-                    aRightBelow = sP[6+_width4];
+                    aRightBelow = sP[7+_width4];
                 } else {
                     rRightBelow = rHere;
                     gRightBelow = gHere;
@@ -1012,7 +1012,7 @@
                     rBelow = sP[0+_width4];
                     gBelow = sP[1+_width4];
                     bBelow = sP[2+_width4];
-                    bBelow = sP[3+_width4];
+                    aBelow = sP[3+_width4];
                 } else {
                     rBelow = rHere;
                     gBelow = gHere;