try to stack

docs/modules/core/pages/effect/effects_overview.adoc

@@ -92,9 +92,9 @@ See also:
 [.float-group]
 --
 [.right.text-left]
-image:effect/water-post.png[water-post.png,width="150",height="100"]
-image:effect/water.png[water.png,width="150",height="100"]
-image:effect/water-reflection-muddy.png[water-reflection-muddy.png,width="150",height="100"]
+image:effect/water-post.png[water-post.png,width="150",height="100"] +
+image:effect/water.png[water.png,width="150",height="100"] +
+image:effect/water-reflection-muddy.png[water-reflection-muddy.png,width="150",height="100"] +
 image:effect/underwater2.jpg[underwater2.jpg,width="150",height="100"]
 
 *  link:{uri-forum}t/monkeys-at-the-beach/15000[Rendering Water as Post-Process Effect] announcement with video.