Picked some slightly less awful particle colors for different terrains and level types. Enabled for half the players.

app/core/ParticleMan.coffee

@@ -1,4 +1,5 @@
 CocoClass = require 'core/CocoClass'
+utils = require 'core/utils'
 
 module.exports = ParticleMan = class ParticleMan extends CocoClass
 
@@ -32,13 +33,11 @@ module.exports = ParticleMan = class ParticleMan extends CocoClass
       100 * 0.5,                  # Right
       100 * 0.5 * @aspectRatio,   # Top
       100 * -0.5 * @aspectRatio,  # Bottom
-      0,                          # Near
-      1000                        # Far
+      0,                          # Near frustrum distance
+      1000                        # Far frustrum distance
     )
     @camera.position.set(0, 0, 100)
-    #@camera.position.set(0, 0, 0)
-    #@camera.lookAt particleGroup.mesh.position
-    @camera.up = new THREE.Vector3(0, 1, 0)  # this might help?  http://stackoverflow.com/questions/14271672/moving-the-camera-lookat-and-rotations-in-three-js
+    @camera.up = new THREE.Vector3(0, 1, 0)  # http://stackoverflow.com/questions/14271672/moving-the-camera-lookat-and-rotations-in-three-js
     @camera.lookAt new THREE.Vector3(0, 0, 0)
     unless @started
       @started = true
@@ -70,8 +69,9 @@ module.exports = ParticleMan = class ParticleMan extends CocoClass
       @framesRendered = 0
       @lastFPS = now
 
-  addEmitter: (x, y, kind="star-fountain") ->
+  addEmitter: (x, y, kind="level-dungeon-premium") ->
     return if @unsupported
+    console.log 'adding kind', kind
     options = $.extend true, {}, particleKinds[kind]
     options.group.texture = THREE.ImageUtils.loadTexture "/images/common/particles/#{options.group.texture}.png"
     scale = 100
@@ -104,53 +104,153 @@ module.exports = ParticleMan = class ParticleMan extends CocoClass
     #@scene.add light
 
 
+hsl = (hue, saturation, lightness) ->
+  new THREE.Color utils.hslToHex([hue, saturation, lightness])
+vec = (x, y, z) ->
+  new THREE.Vector3 x, y, z
+
+defaults =
+  group:
+    texture: 'star'
+    maxAge: 4
+    hasPerspective: 1
+    colorize: 1
+    transparent: 1
+    alphaTest: 0.5
+    depthWrite: false
+    depthTest: true
+    blending: THREE.NormalBlending
+  emitter:
+    type: "cube"
+    particleCount: 60
+    position: vec 0, 0, 0
+    positionSpread: vec 1, 0, 1
+    acceleration: vec 0, -1, 0
+    accelerationSpread: vec 0, 0, 0
+    velocity: vec 0, 4, 0
+    velocitySpread: vec 2, 2, 2
+    sizeStart: 6
+    sizeStartSpread: 0
+    sizeMiddle: 4
+    sizeMiddleSpread: 0
+    sizeEnd: 2
+    sizeEndSpread: 0
+    angleStart: 0
+    angleStartSpread: 0
+    angleMiddle: 0
+    angleMiddleSpread: 0
+    angleEnd: 0
+    angleEndSpread: 0
+    angleAlignVelocity: false
+    colorStart: hsl 0.55, 0.75, 0.75
+    colorStartSpread: vec 0.3, 0.3, 0.3
+    colorMiddle: hsl 0.55, 0.6, 0.5
+    colorMiddleSpread: vec 0.2, 0.2, 0.2
+    colorEnd: hsl 0.55, 0.5, 0.25
+    colorEndSpread: vec 0.1, 0.1, 0.1
+    opacityStart: 1
+    opacityStartSpread: 0
+    opacityMiddle: 0.75
+    opacityMiddleSpread: 0
+    opacityEnd: 0.25
+    opacityEndSpread: 0
+    duration: null
+    alive: 1
+    isStatic: 0
+
+ext = (d, options) ->
+  $.extend true, {}, d, options ? {}
+
 particleKinds =
-  'star-fountain':
-    group:
-      texture: 'star'
-      maxAge: 4
-      hasPerspective: 1
-      colorize: 1
-      transparent: 1
-      alphaTest: 0.5
-      depthWrite: false
-      depthTest: true
-      blending: THREE.NormalBlending
+  'level-dungeon-premium': ext defaults
+  'level-forest-premium': ext defaults,
     emitter:
-      type: "cube"
-      particleCount: 60
-      position: new THREE.Vector3(0, 0, 0)
-      #positionSpread: new THREE.Vector3(2, 2, 0)
-      positionSpread: new THREE.Vector3(1, 0, 1)
-      acceleration: new THREE.Vector3(0, -1, 0)
-      accelerationSpread: new THREE.Vector3(0, 0, 0)
-      velocity: new THREE.Vector3(0, 4, 0)
-      velocitySpread: new THREE.Vector3(2, 2, 2)
-      sizeStart: 8
-      sizeStartSpread: 0
-      sizeMiddle: 4
-      sizeMiddleSpread: 0
-      sizeEnd: 1
-      sizeEndSpread: 0
-      angleStart: 0
-      angleStartSpread: 0
-      angleMiddle: 0
-      angleMiddleSpread: 0
-      angleEnd: 0
-      angleEndSpread: 0
-      angleAlignVelocity: false
-      colorStart: new THREE.Color(0xb9c5ff)
-      colorStartSpread: new THREE.Vector3(0, 0, 0)
-      colorMiddle: new THREE.Color(0x535eff)
-      colorMiddleSpread: new THREE.Vector3(0, 0, 0)
-      colorEnd: new THREE.Color(0x0000c4)
-      colorEndSpread: new THREE.Vector3(0, 0, 0)
-      opacityStart: 1
-      opacityStartSpread: 0
-      opacityMiddle: 0.5
-      opacityMiddleSpread: 0
-      opacityEnd: 0
-      opacityEndSpread: 0
-      duration: null
-      alive: 1
-      isStatic: 0
+      colorStart: hsl 0.56, 0.97, 0.5
+      colorMiddle: hsl 0.56, 0.57, 0.5
+      colorEnd: hsl 0.56, 0.17, 0.5
+  'level-desert-premium': ext defaults,
+    emitter:
+      colorStart: hsl 0.56, 0.97, 0.5
+      colorMiddle: hsl 0.56, 0.57, 0.5
+      colorEnd: hsl 0.56, 0.17, 0.5
+  'level-mountain-premium': ext defaults,
+    emitter:
+      colorStart: hsl 0.56, 0.97, 0.5
+      colorMiddle: hsl 0.56, 0.57, 0.5
+      colorEnd: hsl 0.56, 0.17, 0.5
+
+particleKinds['level-dungeon-gate'] = ext particleKinds['level-dungeon-premium'],
+  emitter:
+    particleCount: 120
+    velocity: vec 0, 6, 0
+    colorStart: hsl 0.5, 0.75, 0.9
+    colorMiddle: hsl 0.5, 0.75, 0.7
+    colorEnd: hsl 0.5, 0.75, 0.3
+    colorStartSpread: vec 1, 1, 1
+    colorMiddleSpread: vec 1.5, 1.5, 1.5
+    colorEndSpread: vec 2.5, 2.5, 2.5
+
+particleKinds['level-dungeon-hero-ladder'] = ext particleKinds['level-dungeon-premium'],
+  emitter:
+    particleCount: 90
+    velocity: vec 0, 4, 0
+    colorStart: hsl 0, 0.75, 0.7
+    colorMiddle: hsl 0, 0.75, 0.5
+    colorEnd: hsl 0, 0.75, 0.3
+
+particleKinds['level-forest-gate'] = ext particleKinds['level-forest-premium'],
+  emitter:
+    particleCount: 120
+    velocity: vec 0, 8, 0
+    colorStart: hsl 0.56, 0.97, 0.3
+    colorMiddle: hsl 0.56, 0.57, 0.3
+    colorEnd: hsl 0.56, 0.17, 0.3
+    colorStartSpread: vec 1, 1, 1
+    colorMiddleSpread: vec 1.5, 1.5, 1.5
+    colorEndSpread: vec 2.5, 2.5, 2.5
+
+particleKinds['level-forest-hero-ladder'] = ext particleKinds['level-forest-premium'],
+  emitter:
+    particleCount: 90
+    velocity: vec 0, 4, 0
+    colorStart: hsl 0, 0.95, 0.3
+    colorMiddle: hsl 0, 1, 0.5
+    colorEnd: hsl 0, 0.75, 0.1
+
+particleKinds['level-desert-gate'] = ext particleKinds['level-desert-premium'],
+  emitter:
+    particleCount: 120
+    velocity: vec 0, 8, 0
+    colorStart: hsl 0.56, 0.97, 0.3
+    colorMiddle: hsl 0.56, 0.57, 0.3
+    colorEnd: hsl 0.56, 0.17, 0.3
+    colorStartSpread: vec 1, 1, 1
+    colorMiddleSpread: vec 1.5, 1.5, 1.5
+    colorEndSpread: vec 2.5, 2.5, 2.5
+
+particleKinds['level-desert-hero-ladder'] = ext particleKinds['level-desert-premium'],
+  emitter:
+    particleCount: 90
+    velocity: vec 0, 4, 0
+    colorStart: hsl 0, 0.95, 0.3
+    colorMiddle: hsl 0, 1, 0.5
+    colorEnd: hsl 0, 0.75, 0.1
+
+particleKinds['level-dungeon-gate'] = ext particleKinds['level-dungeon-premium'],
+  emitter:
+    particleCount: 120
+    velocity: vec 0, 8, 0
+    colorStart: hsl 0.56, 0.97, 0.3
+    colorMiddle: hsl 0.56, 0.57, 0.3
+    colorEnd: hsl 0.56, 0.17, 0.3
+    colorStartSpread: vec 1, 1, 1
+    colorMiddleSpread: vec 1.5, 1.5, 1.5
+    colorEndSpread: vec 2.5, 2.5, 2.5
+
+particleKinds['level-dungeon-hero-ladder'] = ext particleKinds['level-dungeon-premium'],
+  emitter:
+    particleCount: 90
+    velocity: vec 0, 4, 0
+    colorStart: hsl 0, 0.95, 0.3
+    colorMiddle: hsl 0, 1, 0.5
+    colorEnd: hsl 0, 0.75, 0.1

app/models/User.coffee

@@ -123,6 +123,16 @@ module.exports = class User extends CocoModel
     application.tracker.identify gemPromptGroup: @gemPromptGroup unless me.isAdmin()
     @gemPromptGroup
 
+  getForeshadowsLevels: ->
+    return @foreshadowsLevels if @foreshadowsLevels?
+    group = me.get('testGroupNumber') % 16
+    @foreshadowsLevels = switch group
+      when 0, 1, 2, 3, 4, 5, 6, 7 then true
+      when 8, 9, 10, 11, 12, 13, 14, 15 then false
+    @foreshadowsLevels = true if me.isAdmin()
+    application.tracker.identify foreshadowsLevels: @foreshadowsLevels unless me.isAdmin()
+    @foreshadowsLevels
+
   getVideoTutorialStylesIndex: (numVideos=0)->
     # A/B Testing video tutorial styles
     # Not a constant number of videos available (e.g. could be 0, 1, 3, or 4 currently)

app/views/play/CampaignView.coffee

@@ -257,12 +257,17 @@ module.exports = class CampaignView extends RootView
     @playAmbientSound()
 
   testParticles: ->
-    return unless me.isAdmin()
+    return unless @campaign.loaded and me.getForeshadowsLevels()
     @particleMan ?= new ParticleMan()
     @particleMan.removeEmitters()
     @particleMan.attach @$el.find('.map')
-    for levelID, level of @campaign.renderedLevels ? {} when level.hidden
-      @particleMan.addEmitter level.position.x / 100, level.position.y / 100
+    for level in @campaign.renderedLevels ? {} when level.hidden
+      particleKey = ['level', @terrain]
+      particleKey.push level.type if level.type and level.type isnt 'hero'
+      particleKey.push 'premium' if level.requiresSubscription
+      particleKey.push 'gate' if level.slug in ['kithgard-gates', 'siege-of-stonehold', 'clash-of-clones']
+      continue if particleKey.length is 2  # Don't show basic levels
+      @particleMan.addEmitter level.position.x / 100, level.position.y / 100, particleKey.join('-')
 
   onSessionsLoaded: (e) ->
     return if @editorMode