diff --git a/zoneb/bin/data/shaders/particles/draw.frag b/zoneb/bin/data/shaders/particles/draw.frag
index 628ed5d..4961d68 100755
--- a/zoneb/bin/data/shaders/particles/draw.frag
+++ b/zoneb/bin/data/shaders/particles/draw.frag
@@ -9,14 +9,23 @@ uniform sampler2DRect   imageTexture;
 
 uniform vec3 uHottest0;
 uniform vec3 uHottest1;
+uniform vec3 uHottest3d0;
+uniform vec3 uHottest3d1;
 
 in vec2 texCoordVarying;
+in vec3 vPos;
 in float vTemperature;
 in float vAge;
 
 void main()
 {
-    vec3 remapedColor = texture(imageTexture, vec2(vTemperature*1600, 0.5)).xyz;
-    float alpha = max(0, 1 - pow(vAge,4));
-    fragColor = vec4(remapedColor, alpha);
+  vec3 remapedColor = texture(imageTexture, vec2(vTemperature*1600, 0.5)).xyz;
+  float alpha = max(0, 1 - pow(vAge,4));
+  
+  vec4 color = vec4(remapedColor, alpha);
+
+  if(length(vPos.x - uHottest3d1.x) < 500) {
+    color = vec4(0,1,0,1);
+  }
+  fragColor = color;
 }
diff --git a/zoneb/bin/data/shaders/particles/draw.vert b/zoneb/bin/data/shaders/particles/draw.vert
index 449e9da..96a7ebf 100755
--- a/zoneb/bin/data/shaders/particles/draw.vert
+++ b/zoneb/bin/data/shaders/particles/draw.vert
@@ -7,6 +7,7 @@ in vec4  position;
 in vec2  texcoord;
 
 out vec2 texCoordVarying;
+out vec3 vPos;
 out float vTemperature;
 out float vAge;
 
@@ -16,5 +17,6 @@ void main()
     vec4 misc = texture(particles2, texCoordVarying);
     vTemperature = misc.x;
     vAge = misc.y;
-    gl_Position = modelViewProjectionMatrix * vec4(texture(particles0, texCoordVarying).xyz, 1.0);
+    vPos = texture(particles0, texCoordVarying).xyz;
+    gl_Position = modelViewProjectionMatrix * vec4(vPos, 1.0);
 }
diff --git a/zoneb/src/ofApp.cpp b/zoneb/src/ofApp.cpp
index ce19711..2251dd6 100644
--- a/zoneb/src/ofApp.cpp
+++ b/zoneb/src/ofApp.cpp
@@ -161,9 +161,10 @@ void ofApp::exit()
 ofVec3f ofApp::getDepthAt(int x, int y)
 {
   auto ray = kinectDevice.getDepthToWorldPix().getColor(x, y);
-  float depth = kinectDevice.getDepthPix().getColor(x, y).r;
-  if (depth == 0)
-    depth = 2000;
+  auto depthShort = kinectDevice.getDepthPix().getColor(x, y).r;
+  float depth = -depthShort;
+  if (depthShort == 0)
+    depth = -2000;
   ofVec3f pos(ray.r * depth, ray.g * depth, depth);
   return pos;
 }