From 66254ee230a8092fd650394ed133e04e74832386 Mon Sep 17 00:00:00 2001
From: Robin Hawkes <rob.hawkes@gmail.com>
Date: Tue, 13 Dec 2016 22:04:33 +0000
Subject: [PATCH 1/2] Allow polygon render order to be forced regardless of
 flatness

---
 src/layer/geometry/PolygonLayer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/layer/geometry/PolygonLayer.js b/src/layer/geometry/PolygonLayer.js
index b89c768..b707a11 100644
--- a/src/layer/geometry/PolygonLayer.js
+++ b/src/layer/geometry/PolygonLayer.js
@@ -402,7 +402,7 @@ class PolygonLayer extends Layer {
       mesh.receiveShadow = true;
     }
 
-    if (flat) {
+    if (flat || style.renderOrder !== undefined) {
       material.depthWrite = false;
 
       var renderOrder = (style.renderOrder !== undefined) ? style.renderOrder : 3;

From 3d47cb1966ad113c7d21a0873f71973e812f3373 Mon Sep 17 00:00:00 2001
From: Robin Hawkes <rob.hawkes@gmail.com>
Date: Tue, 13 Dec 2016 22:24:40 +0000
Subject: [PATCH 2/2] Allow depth write to be ignored

---
 src/layer/geometry/PolygonLayer.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/layer/geometry/PolygonLayer.js b/src/layer/geometry/PolygonLayer.js
index b707a11..47bc029 100644
--- a/src/layer/geometry/PolygonLayer.js
+++ b/src/layer/geometry/PolygonLayer.js
@@ -403,7 +403,9 @@ class PolygonLayer extends Layer {
     }
 
     if (flat || style.renderOrder !== undefined) {
-      material.depthWrite = false;
+      if (!style.ignoreDepth) {
+        material.depthWrite = false;
+      }
 
       var renderOrder = (style.renderOrder !== undefined) ? style.renderOrder : 3;
       mesh.renderOrder = renderOrder;