it is done

core/src/mindustry/graphics/CacheLayer.java

@@ -0,0 +1,66 @@
+package mindustry.graphics;
+
+import arc.Core;
+import arc.graphics.Color;
+import arc.graphics.g2d.Draw;
+import arc.graphics.gl.Shader;
+
+import static arc.Core.camera;
+import static mindustry.Vars.renderer;
+
+public enum CacheLayer{
+    water{
+        @Override
+        public void begin(){
+            beginShader();
+        }
+
+        @Override
+        public void end(){
+            endShader(Shaders.water);
+        }
+    },
+    tar{
+        @Override
+        public void begin(){
+            beginShader();
+        }
+
+        @Override
+        public void end(){
+            endShader(Shaders.tar);
+        }
+    },
+    normal,
+    walls;
+
+    public void begin(){
+
+    }
+
+    public void end(){
+
+    }
+
+    void beginShader(){
+        if(!Core.settings.getBool("animatedwater")) return;
+
+        renderer.blocks.floor.endc();
+        renderer.shieldBuffer.begin();
+        Core.graphics.clear(Color.clear);
+        renderer.blocks.floor.beginc();
+    }
+
+    void endShader(Shader shader){
+        if(!Core.settings.getBool("animatedwater")) return;
+
+        renderer.blocks.floor.endc();
+        renderer.shieldBuffer.end();
+
+        Draw.shader(shader);
+        Draw.rect(Draw.wrap(renderer.shieldBuffer.getTexture()), camera.position.x, camera.position.y, camera.width, -camera.height);
+        Draw.shader();
+
+        renderer.blocks.floor.beginc();
+    }
+}