Tweaked the randomize buttons and modal (also changing it to "generate terrain" and refactoring related files accordingly).

app/locale/en.coffee

@@ -557,7 +557,7 @@
     grassy: "Grassy"
     fork_title: "Fork New Version"
     fork_creating: "Creating Fork..."
-    randomize: "Randomize"
+    generate_terrain: "Generate Terrain"
     more: "More"
     wiki: "Wiki"
     live_chat: "Live Chat"

app/styles/editor/level/modal/generate-terrain-modal.sass

@@ -1,13 +1,16 @@
-#terrain-randomize-modal
+#generate-terrain-modal
 
   .choose-option
     margin-bottom: 15px
-    width: 100%
+    width: 48%
+    margin-right: 1%
+    margin-left: 1%
     height: 200px
     overflow: hidden
     background: white
     border: 1px solid #333
     position: relative
+    float: left
 
     -webkit-transition: opacity 0.3s ease-in-out
     -moz-transition: opacity 0.3s ease-in-out

app/styles/editor/level/thangs-tab-view.sass

@@ -12,6 +12,9 @@
   
   #thangs-container-toggle, #thangs-palette-toggle
     top: 5px
+    position: absolute
+    z-index: 12
+    padding: 8px
 
   #thangs-container-toggle
     left: 5px
@@ -21,11 +24,6 @@
     right: 5px
     box-shadow: -1px 1px 5px black
     
-  .toggle
-    position: absolute
-    z-index: 12
-    padding: 8px
-      
   .thangs-container
     background: white
     width: $extantThangsWidth
@@ -73,10 +71,10 @@
       position: relative
       text-align: center
       
-      #randomize-button
+      .generate-terrain-button
         position: absolute
         top: 45%
-        height: 40px
+        //height: 40px
 
 
   

app/templates/editor/level/edit.jade

@@ -94,7 +94,7 @@ block header
             li(class=anonymous ? "disabled": "")
               a(data-toggle="coco-modal", data-target="modal/RevertModal", data-i18n="editor.revert")#revert-button Revert
             li(class=anonymous ? "disabled": "")
-              a(data-toggle="coco-modal", data-target="editor/level/modals/TerrainRandomizeModal", data-i18n="editor.randomize")#randomize-button Randomize
+              a(data-toggle="coco-modal", data-target="editor/level/modals/GenerateTerrainModal", data-i18n="editor.generate_terrain").generate-terrain-button Generate Terrain
             li(class=anonymous ? "disabled": "")
               a(data-i18n="editor.pop_i18n")#pop-level-i18n-button Populate i18n
             li.divider

app/templates/editor/level/modal/generate-terrain-modal.jade

@@ -13,4 +13,5 @@ block modal-body-content
               span(data-i18n="editor."+size)  #{size}
             div.preset-name.capitalize
               span(data-i18n="editor."+preset.type) #{preset.type}
+    .clearfix
 block modal-footer

app/templates/editor/level/thangs-tab-view.jade

@@ -1,6 +1,6 @@
-button.toggle.btn#thangs-container-toggle
+button.btn#thangs-container-toggle
   span.icon-list
-button.toggle.btn#thangs-palette-toggle
+button.btn#thangs-palette-toggle
   span.icon-plus
 .thangs-container.hide#all-thangs
   h3(data-i18n="editor.level_tab_thangs_title") Current Thangs
@@ -8,7 +8,7 @@ button.toggle.btn#thangs-palette-toggle
 
 .world-container
   #canvas-wrapper
-    button.btn.btn-primary(id="randomize-button", data-toggle="coco-modal", data-target="editor/level/modals/TerrainRandomizeModal", data-i18n="editor.randomize", title="Randomize Terrain") Randomize
+    button.generate-terrain-button.btn.btn-info.btn-lg(data-toggle="coco-modal", data-target="editor/level/modals/GenerateTerrainModal", data-i18n="editor.generate_terrain", title="Generate Terrain") Generate Terrain
     ul.dropdown-menu#contextmenu
       li#delete
         a(data-i18n="editor.delete") Delete

app/views/editor/level/modals/GenerateTerrainModal.coffee

@@ -1,5 +1,5 @@
 ModalView = require 'views/kinds/ModalView'
-template = require 'templates/editor/level/modal/terrain_randomize'
+template = require 'templates/editor/level/modal/generate-terrain-modal'
 CocoModel = require 'models/CocoModel'
 
 clusters = {
@@ -229,11 +229,14 @@ thangSizes = {
   }}
 
 
-module.exports = class TerrainRandomizeModal extends ModalView
-  id: 'terrain-randomize-modal'
+module.exports = class GenerateTerrainModal extends ModalView
+  id: 'generate-terrain-modal'
   template: template
+  plain: true
+  modalWidthPercent: 90
+  
   events:
-    'click .choose-option': 'onRandomize'
+    'click .choose-option': 'onGenerate'
 
   onRevertModel: (e) ->
     id = $(e.target).val()
@@ -241,25 +244,25 @@ module.exports = class TerrainRandomizeModal extends ModalView
     $(e.target).closest('tr').remove()
     @reloadOnClose = true
 
-  onRandomize: (e) ->
+  onGenerate: (e) ->
     target = $(e.target)
     presetType = target.attr 'data-preset-type'
     presetSize = target.attr 'data-preset-size'
-    @randomizeThangs presetType, presetSize
+    @generateThangs presetType, presetSize
     Backbone.Mediator.publish 'editor:random-terrain-generated', thangs: @thangs, terrain: presets[presetType].terrainName
     @hide()
 
-  randomizeThangs: (presetName, presetSize) ->
+  generateThangs: (presetName, presetSize) ->
     @falseCount = 0
     preset = presets[presetName]
     presetSize = presetSizes[presetSize]
     @thangs = []
     @rects = []
-    @randomizeFloor preset, presetSize
-    @randomizeBorder preset, presetSize, preset.borderNoise
-    @randomizeDecorations preset, presetSize
+    @generateFloor preset, presetSize
+    @generateBorder preset, presetSize, preset.borderNoise
+    @generateDecorations preset, presetSize
 
-  randomizeFloor: (preset, presetSize) ->
+  generateFloor: (preset, presetSize) ->
     for i in _.range(0, presetSize.x, thangSizes.floorSize.x)
       for j in _.range(0, presetSize.y, thangSizes.floorSize.y)
         @thangs.push {
@@ -271,7 +274,7 @@ module.exports = class TerrainRandomizeModal extends ModalView
           'margin': clusters[preset.floors].margin
         }
 
-  randomizeBorder: (preset, presetSize, noiseFactor=1) ->
+  generateBorder: (preset, presetSize, noiseFactor=1) ->
     for i in _.range(0, presetSize.x, thangSizes.borderSize.x)
       for j in _.range(preset.borderThickness)
         # Bottom wall
@@ -349,7 +352,7 @@ module.exports = class TerrainRandomizeModal extends ModalView
         }
           continue
 
-  randomizeDecorations: (preset, presetSize)->
+  generateDecorations: (preset, presetSize)->
     for name, decoration of preset.decorations
       for num in _.range(presetSize.sizeFactor * _.random(decoration.num[0], decoration.num[1]))
         if @['build'+name] isnt undefined

app/views/editor/level/thangs/ThangsTabView.coffee

@@ -152,7 +152,7 @@ module.exports = class ThangsTabView extends CocoView
     oldHeight = $('#thangs-list').height()
     $('#thangs-list').height(oldHeight - thangsHeaderHeight)
     if data.thangs?.length
-      @$el.find('#randomize-button').hide()
+      @$el.find('.generate-terrain-button').hide()
 
   initSurface: ->
     surfaceCanvas = $('canvas#surface', @$el)
@@ -415,7 +415,7 @@ module.exports = class ThangsTabView extends CocoView
     @thangsBatch = []
 
   addThang: (thangType, pos, batchInsert=false) ->
-    @$el.find('#randomize-button').hide()
+    @$el.find('.generate-terrain-button').hide()
     if batchInsert
       if thangType.get('name') is 'Hero Placeholder'
         thangID = 'Hero Placeholder'