fix direct volume shader

CHANGELOG.md

@@ -6,6 +6,11 @@ Note that since we don't clearly distinguish between a public and private interf
 
 ## [Unreleased]
 
+
+## [v2.3.3] - 2021-10-01
+
+- Fix direct volume shader
+
 ## [v2.3.2] - 2021-10-01
 
 - Prefer WebGL1 on iOS devices until WebGL2 support has stabilized.

src/mol-gl/shader/direct-volume.frag.ts

@@ -55,6 +55,7 @@ uniform vec3 uHighlightColor;
 uniform vec3 uSelectColor;
 uniform float uHighlightStrength;
 uniform float uSelectStrength;
+uniform int uMarkerPriority;
 
 #if defined(dMarkerType_uniform)
     uniform float uMarker;