diff --git a/images/terrain/flag-cave-neutral.png b/images/terrain/flag-cave-neutral.png
index 1b044e8cb5a..daf1256170c 100644
Binary files a/images/terrain/flag-cave-neutral.png and b/images/terrain/flag-cave-neutral.png differ
diff --git a/images/terrain/flag-coast-neutral.png b/images/terrain/flag-coast-neutral.png
index f777afb7369..d3628803989 100644
Binary files a/images/terrain/flag-coast-neutral.png and b/images/terrain/flag-coast-neutral.png differ
diff --git a/images/terrain/flag-snow-neutral.png b/images/terrain/flag-snow-neutral.png
index bdfc620a607..8a9c9da29e9 100644
Binary files a/images/terrain/flag-snow-neutral.png and b/images/terrain/flag-snow-neutral.png differ
diff --git a/images/terrain/flag-swampwater-neutral.png b/images/terrain/flag-swampwater-neutral.png
index d822f847551..4c0113a14f9 100644
Binary files a/images/terrain/flag-swampwater-neutral.png and b/images/terrain/flag-swampwater-neutral.png differ