diff --git a/.travis.yml b/.travis.yml
index a92a1718..217154e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -69,6 +69,26 @@ script:
   - export BRANCH="$TRAVIS_BRANCH"
   - if [[ "$BRANCH" == "$TAG" ]]; then export BRANCH=master; fi
 
+  # (Mac) Test
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-addax.ds3 -o addax.obj || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-addax.ds3 -o addax.glb || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-addax.ds3 -o addax.fbx || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-bicycle.ds3 -o bicycle.obj || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-bicycle.ds3 -o bicycle.glb || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-bicycle.ds3 -o bicycle.fbx || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-bob.ds3 -o bob.obj || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-bob.ds3 -o bob.glb || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-bob.ds3 -o bob.fbx || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-dog-head.ds3 -o dog-head.obj || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-dog-head.ds3 -o dog-head.glb || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-dog-head.ds3 -o dog-head.fbx || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-meerkat.ds3 -o meerkat.obj || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-meerkat.ds3 -o meerkat.glb || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-meerkat.ds3 -o meerkat.fbx || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-mosquito.ds3 -o mosquito.obj || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-mosquito.ds3 -o mosquito.glb || travis_terminate 1; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then dust3d.app/Contents/MacOS/dust3d :/resources/model-mosquito.ds3 -o mosquito.fbx || travis_terminate 1; fi
+
   # (Mac) Prepare dmg
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then mv dust3d.app dust3d-$TAG.app || travis_terminate 1; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then macdeployqt dust3d-$TAG.app -dmg || travis_terminate 1; fi
diff --git a/appveyor.yml b/appveyor.yml
index a20af4d0..874e80e1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -65,6 +65,27 @@ after_test:
   - mkdir imageformats
   - copy %QTDIR%\plugins\imageformats\qjpeg.dll %APPVEYOR_BUILD_FOLDER%\imageformats\qjpeg.dll
   - 7z a dust3d-%TAG%-%PLATFORM%.zip -r %APPVEYOR_BUILD_FOLDER%\imageformats\
+  - mkdir test
+  - 7z e dust3d-%TAG%-%PLATFORM%.zip -o%APPVEYOR_BUILD_FOLDER%\test *.* -r
+  - cd /d %APPVEYOR_BUILD_FOLDER%\test
+  - dust3d.exe :/resources/model-addax.ds3 -o addax.obj
+  - dust3d.exe :/resources/model-addax.ds3 -o addax.fbx
+  - dust3d.exe :/resources/model-addax.ds3 -o addax.glb
+  - dust3d.exe :/resources/model-bicycle.ds3 -o bicycle.obj
+  - dust3d.exe :/resources/model-bicycle.ds3 -o bicycle.fbx
+  - dust3d.exe :/resources/model-bicycle.ds3 -o bicycle.glb
+  - dust3d.exe :/resources/model-bob.ds3 -o bob.obj
+  - dust3d.exe :/resources/model-bob.ds3 -o bob.fbx
+  - dust3d.exe :/resources/model-bob.ds3 -o bob.glb
+  - dust3d.exe :/resources/model-dog-head.ds3 -o dog-head.obj
+  - dust3d.exe :/resources/model-dog-head.ds3 -o dog-head.fbx
+  - dust3d.exe :/resources/model-dog-head.ds3 -o dog-head.glb
+  - dust3d.exe :/resources/model-meerkat.ds3 -o meerkat.obj
+  - dust3d.exe :/resources/model-meerkat.ds3 -o meerkat.fbx
+  - dust3d.exe :/resources/model-meerkat.ds3 -o meerkat.glb
+  - dust3d.exe :/resources/model-mosquito.ds3 -o mosquito.obj
+  - dust3d.exe :/resources/model-mosquito.ds3 -o mosquito.fbx
+  - dust3d.exe :/resources/model-mosquito.ds3 -o mosquito.glb
 
 artifacts:
   - path: '*.zip'
diff --git a/shaders/pbr-qt.frag b/shaders/pbr-qt.frag
index 3c6c0017..7a1ac35a 100644
--- a/shaders/pbr-qt.frag
+++ b/shaders/pbr-qt.frag
@@ -82,14 +82,14 @@ const int TYPE_DIRECTIONAL = 1;
 const int TYPE_SPOT = 2;
 struct Light {
     int type;
-    vec3 position;
-    vec3 color;
-    float intensity;
-    vec3 direction;
-    float constantAttenuation;
-    float linearAttenuation;
-    float quadraticAttenuation;
-    float cutOffAngle;
+    highp vec3 position;
+    highp vec3 color;
+    highp float intensity;
+    highp vec3 direction;
+    highp float constantAttenuation;
+    highp float linearAttenuation;
+    highp float quadraticAttenuation;
+    highp float cutOffAngle;
 };
 int lightCount;
 Light lights[MAX_LIGHTS];