Merge pull request CesiumGS#1459 from AnalyticalGraphicsInc/multifrustum

Fix translucent multifrustum artifact

CHANGES.md

@@ -56,6 +56,7 @@ Beta Releases
 * View-dependent imagery source attribution is now added to the `CreditDisplay` by the `BingMapsImageryProvider`.
 * `BingMapsImageryProvider` now uses HTTPS by default for metadata and tiles when the document is loaded over HTTPS.
 * `RequestErrorEvent` now includes the headers that were returned with the error response.
+* Fix multifrustum translucent rendering artifact.
 * Added `CesiumInspector` widget for graphics debugging.  In Cesium Viewer, it is enabled by using the query parameter `inspector=true`.
 * Fixed `WallGeometry` bug that failed by removing positions that were less close together by less than 6 decimal places. [#1483](https://github.com/AnalyticalGraphicsInc/cesium/pull/1483)
 * `DynamicEllipse`, `DynamicPolygon`, and `DynamicEllipsoid` now have properties matching their geometry counterpart, i.e. `EllipseGeometry`, `EllipseOutlineGeometry`, etc. These properties are also available in CZML.

Source/Scene/Scene.js

@@ -472,11 +472,6 @@ define([
             var curNear = Math.max(near, Math.pow(farToNearRatio, m) * near);
             var curFar = Math.min(far, farToNearRatio * curNear);
 
-            if (m !== 0) {
-                // Avoid tearing artifacts between adjacent frustums
-                curNear *= 0.99;
-            }
-
             var frustumCommands = frustumCommandsList[m];
             if (!defined(frustumCommands)) {
                 frustumCommands = frustumCommandsList[m] = new FrustumCommands(curNear, curFar);
@@ -836,6 +831,11 @@ define([
             frustum.near = frustumCommands.near;
             frustum.far = frustumCommands.far;
 
+            if (index !== 0) {
+                // Avoid tearing artifacts between adjacent frustums
+                frustum.near *= 0.99;
+            }
+
             us.updateFrustum(frustum);
 
             var j;
@@ -845,6 +845,9 @@ define([
                 executeCommand(commands[j], scene, context, passState);
             }
 
+            frustum.near = frustumCommands.near;
+            us.updateFrustum(frustum);
+
             commands = frustumCommands.translucentCommands;
             length = commands.length = frustumCommands.translucentIndex;
             for (j = 0; j < length; ++j) {