diff --git a/.github/workflows/build-usd.yml b/.github/workflows/build-usd.yml
index 4d4e828a..a760e972 100644
--- a/.github/workflows/build-usd.yml
+++ b/.github/workflows/build-usd.yml
@@ -26,6 +26,14 @@ on:
         required: false
         type: boolean
         default: false
+      run-graphical-tests:
+        required: false
+        type: boolean
+        default: false
+      upload-test-artifacts:
+        required: false
+        type: boolean
+        default: false
 
 jobs:
   build:
@@ -41,6 +49,7 @@ jobs:
           upload-archive: ${{ inputs.upload-archives }}
           archive-file-name: "gatling_USD${{ inputs.usd-version }}_Linux_x64.tar.gz"
           cmake-params:
+          run-graphical-tests: ${{ inputs.run-grahical-tests }}
 
         - name: Ubuntu / clang
           image: ubuntu-20.04
@@ -49,6 +58,7 @@ jobs:
           # Don't upload clang build results -- we already have GCC's
           upload-archive: false
           cmake-params: -DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++
+          run-graphical-tests: false
 
         - name: Windows / MSVC
           image: windows-2019
@@ -57,6 +67,7 @@ jobs:
           upload-archive: ${{ inputs.upload-archives }}
           archive-file-name: "gatling_USD${{ inputs.usd-version }}_Windows_x64.tar.gz"
           cmake-params: -G"Visual Studio 16 2019" -Ax64
+          run-graphical-tests: false
 
     uses: ./.github/workflows/build.yml
     with:
@@ -69,3 +80,5 @@ jobs:
       archive-file-name: ${{ matrix.archive-file-name }}
       mdl-sdk-cache-key: ${{ inputs.mdl-sdk-cache-key-prefix }}_${{ matrix.image }}
       cmake-params: ${{ matrix.cmake-params }}
+      run-grapical-tests: ${{ matrix.run-graphical-tests }}
+      upload-test-artifacts: ${{ inputs.upload-test-artifacts }}
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f8d4e5a1..5b252426 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -36,6 +36,14 @@ on:
         required: false
         type: boolean
         default: false
+      run-graphical-tests:
+        required: false
+        type: boolean
+        default: false
+      upload-test-artifacts:
+        required: false
+        type: boolean
+        default: false
 
 defaults:
   run:
@@ -54,12 +62,39 @@ jobs:
       uses: actions/checkout@v4
       with:
         submodules: recursive
+        lfs: true
 
     - name: Install libgl1 package
       if: runner.os == 'Linux'
       # There seems to be a transitive dependency on libGL (perhaps by hgi)
       run: sudo apt-get update && sudo apt-get install libgl1-mesa-dev
 
+    # TODO: fixed/release Mesa version
+    - name: Install packages
+      if: inputs.run-graphical-tests
+      run: |
+        #sudo add-apt-repository ppa:kisak/kisak-mesa
+        sudo apt update
+        sudo apt upgrade
+        sudo apt-get install mesa-utils xvfb qt5-default libgl1-mesa-dev libvulkan-dev vulkan-tools mesa-vulkan-drivers
+
+    - name: Set up graphical environment variables
+      if: inputs.run-graphical-tests
+      run: |
+        echo "LD_LIBRARY_PATH=${{ inputs.usd-install-path }}/lib" >> $GITHUB_ENV
+        echo "DISPLAY=:1" >> $GITHUB_ENV
+        echo "LIBGL_ALWAYS_SOFTWARE=1" >> $GITHUB_ENV
+        echo "GALLIUM_DRIVER=llvmpipe" >> $GITHUB_ENV
+
+    - name: Start virtual framebuffer
+      if: inputs.run-graphical-tests
+      run: |
+        Xvfb :1 -screen 0 1280x960x24 &
+
+    - name: Test vulkaninfo
+      if: inputs.run-graphical-tests
+      run: vulkaninfo
+
     - name: Fetch USD binaries
       run: curl ${{ inputs.usd-download-url }} -L -v -o USD.tar.gz
 
@@ -117,6 +152,11 @@ jobs:
       if: runner.os == 'Windows'
       run: ./bin/imgio_test.exe
 
+    - name: Run hdGatling_test
+      working-directory: BUILD
+      if: inputs.run-graphical-tests
+      run: ./bin/hdGatling_test
+
     - name: Install gatling
       working-directory: BUILD
       run: cmake --install . --config ${{ inputs.build-config }} --component hdGatling
@@ -134,6 +174,19 @@ jobs:
         mv hdGatling dso/usd_plugins
         mv hdGatling* dso/usd
 
+    #- name: Create archive
+    #  if: ${{ inputs.run-graphical-tests && inputs.upload-test-artifacts && failure() }}
+    #  working-directory: TEST
+    #  run: tar -zcvf test.zip *
+
+    - name: Upload archive
+      if: ${{ inputs.run-graphical-tests && inputs.upload-test-artifacts && failure() }}
+      uses: actions/upload-artifact@v3
+      with:
+        name: test-artifacts
+        path: TEST/*
+        retention-days: 7
+
     - name: Create archive
       if: inputs.upload-archive
       working-directory: INSTALL
diff --git a/.github/workflows/deploy-release.yml b/.github/workflows/deploy-release.yml
index a781348c..47a094a5 100644
--- a/.github/workflows/deploy-release.yml
+++ b/.github/workflows/deploy-release.yml
@@ -18,6 +18,7 @@ jobs:
       usd-version: 24.11
       mdl-sdk-cache-key-prefix: ${{ vars.MDL_SDK_CACHE_KEY_PREFIX }}
       upload-archives: true
+      run-graphical-tests: true
 
   build-usd2408:
     name: Build gatling for USD v24.08
@@ -27,6 +28,7 @@ jobs:
       usd-version: 24.08
       mdl-sdk-cache-key-prefix: ${{ vars.MDL_SDK_CACHE_KEY_PREFIX }}
       upload-archives: true
+      run-graphical-tests: true
 
   build-usd2405:
     name: Build gatling for USD v24.05
diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index 14cd6f09..a9ffdffc 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -2,9 +2,9 @@ name: Validation Build
 
 on:
   push:
-    branches:
-      - 'master'
-      - 'dev'
+    #branches:
+    #  - 'master'
+    #  - 'dev'
     paths-ignore:
       - '**.md'
       - '**.glsl'
@@ -23,6 +23,8 @@ jobs:
     with:
       usd-version: 24.11
       mdl-sdk-cache-key-prefix: ${{ vars.MDL_SDK_CACHE_KEY_PREFIX }}
+      run-graphical-tests: true
+      upload-test-artifacts: true
 
   build-2408:
     name: Build gatling for USD v24.08 (Release)
@@ -31,6 +33,8 @@ jobs:
     with:
       usd-version: 24.08
       mdl-sdk-cache-key-prefix: ${{ vars.MDL_SDK_CACHE_KEY_PREFIX }}
+      run-graphical-tests: true
+      upload-test-artifacts: true
 
   build-2405:
     name: Build gatling for USD v24.05 (Release)