diff --git a/cmake/externals/glad32es/CMakeLists.txt b/cmake/externals/glad32es/CMakeLists.txt
deleted file mode 100644
index 8487e5aaaf..0000000000
--- a/cmake/externals/glad32es/CMakeLists.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-set(EXTERNAL_NAME glad32es)
-
-include(ExternalProject)
-include(SelectLibraryConfigurations)
-
-ExternalProject_Add(
-  ${EXTERNAL_NAME}
-  URL "${EXTERNAL_BUILD_ASSETS}/dependencies/glad/glad32es.zip"
-  URL_MD5 6a641d8c49dee4c895fa59315f5682a6
-  CONFIGURE_COMMAND CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-  LOG_DOWNLOAD 1
-  LOG_CONFIGURE 1
-  LOG_BUILD 1
-)
-
-# Hide this external target (for ide users)
-string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
-set_target_properties(${EXTERNAL_NAME} PROPERTIES FOLDER "hidden/externals")
-ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
-
-if (UNIX)
-  set(LIB_PREFIX "lib")
-  set(LIB_EXT "a")
-elseif (WIN32)
-  set(LIB_EXT "lib")
-endif ()
-
-set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/${LIB_PREFIX}glad_d.${LIB_EXT})
-set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/${LIB_PREFIX}glad.${LIB_EXT})
-select_library_configurations(${EXTERNAL_NAME_UPPER})
-
-set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIRS ${INSTALL_DIR}/include CACHE PATH "List of glad include directories")
-set(${EXTERNAL_NAME_UPPER}_LIBRARY ${${EXTERNAL_NAME_UPPER}_LIBRARY} CACHE INTERNAL "glad libraries")
diff --git a/cmake/externals/glad41/CMakeLists.txt b/cmake/externals/glad41/CMakeLists.txt
deleted file mode 100644
index 76382dd05d..0000000000
--- a/cmake/externals/glad41/CMakeLists.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-set(EXTERNAL_NAME glad41)
-
-include(ExternalProject)
-include(SelectLibraryConfigurations)
-
-ExternalProject_Add(
-  ${EXTERNAL_NAME}
-  URL "${EXTERNAL_BUILD_ASSETS}/dependencies/glad/glad41.zip"
-  URL_MD5 1324eeec33abe91e67d19ae551ba624d
-  CONFIGURE_COMMAND CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-  LOG_DOWNLOAD 1
-  LOG_CONFIGURE 1
-  LOG_BUILD 1
-)
-
-# Hide this external target (for ide users)
-string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
-set_target_properties(${EXTERNAL_NAME} PROPERTIES FOLDER "hidden/externals")
-ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
-
-if (UNIX)
-  set(LIB_PREFIX "lib")
-  set(LIB_EXT "a")
-elseif (WIN32)
-  set(LIB_EXT "lib")
-endif ()
-
-set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/${LIB_PREFIX}glad_d.${LIB_EXT})
-set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/${LIB_PREFIX}glad.${LIB_EXT})
-select_library_configurations(${EXTERNAL_NAME_UPPER})
-
-set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIRS ${INSTALL_DIR}/include CACHE PATH "List of glad include directories")
-set(${EXTERNAL_NAME_UPPER}_LIBRARY ${${EXTERNAL_NAME_UPPER}_LIBRARY} CACHE INTERNAL "glad libraries")
diff --git a/cmake/externals/glad45/CMakeLists.txt b/cmake/externals/glad45/CMakeLists.txt
deleted file mode 100644
index 477a5f79d5..0000000000
--- a/cmake/externals/glad45/CMakeLists.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-set(EXTERNAL_NAME glad45)
-
-include(ExternalProject)
-include(SelectLibraryConfigurations)
-
-ExternalProject_Add(
-  ${EXTERNAL_NAME}
-  URL "${EXTERNAL_BUILD_ASSETS}/dependencies/glad/glad45.zip"
-  URL_MD5 cfb19b3cb5b2f8f1d1669fb3150e5f05
-  CONFIGURE_COMMAND CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-  LOG_DOWNLOAD 1
-  LOG_CONFIGURE 1
-  LOG_BUILD 1
-)
-
-# Hide this external target (for ide users)
-string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
-set_target_properties(${EXTERNAL_NAME} PROPERTIES FOLDER "hidden/externals")
-ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
-
-if (UNIX)
-  set(LIB_PREFIX "lib")
-  set(LIB_EXT "a")
-elseif (WIN32)
-  set(LIB_EXT "lib")
-endif ()
-
-set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/${LIB_PREFIX}glad_d.${LIB_EXT})
-set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/${LIB_PREFIX}glad.${LIB_EXT})
-select_library_configurations(${EXTERNAL_NAME_UPPER})
-
-set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIRS ${INSTALL_DIR}/include CACHE PATH "List of glad include directories")
-set(${EXTERNAL_NAME_UPPER}_LIBRARY ${${EXTERNAL_NAME_UPPER}_LIBRARY} CACHE INTERNAL "glad libraries")
diff --git a/cmake/externals/polyvox/CMakeLists.txt b/cmake/externals/polyvox/CMakeLists.txt
deleted file mode 100644
index 63a4bee043..0000000000
--- a/cmake/externals/polyvox/CMakeLists.txt
+++ /dev/null
@@ -1,82 +0,0 @@
-set(EXTERNAL_NAME polyvox)
-
-include(ExternalProject)
-
-message(STATUS "===== POLYVOX BUILD_TYPE ${BUILD_TYPE} ${CMAKE_BUILD_TYPE}")
-set(CMAKE_BUILD_TYPE Release)
-
-ExternalProject_Add(
-  ${EXTERNAL_NAME}
-  URL "${EXTERNAL_BUILD_ASSETS}/dependencies/polyvox-master-2015-7-15.zip"
-  URL_MD5 9ec6323b87e849ae36e562ae1c7494a9
-  CMAKE_ARGS -DENABLE_EXAMPLES=OFF -DENABLE_BINDINGS=OFF -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-  BINARY_DIR ${EXTERNAL_PROJECT_PREFIX}/build
-  LOG_DOWNLOAD 1
-  LOG_CONFIGURE 1
-  LOG_BUILD 1
-)
-
-# Hide this external target (for ide users)
-set_target_properties(${EXTERNAL_NAME} PROPERTIES FOLDER "hidden/externals")
-
-ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
-
-if (APPLE)
-  set(INSTALL_NAME_LIBRARY_DIR ${INSTALL_DIR}/lib)
-
-  ExternalProject_Add_Step(
-    ${EXTERNAL_NAME}
-    change-install-name-debug
-    COMMENT "Calling install_name_tool on libraries to fix install name for dylib linking"
-    COMMAND ${CMAKE_COMMAND} -DINSTALL_NAME_LIBRARY_DIR=${INSTALL_NAME_LIBRARY_DIR}/Debug -P ${EXTERNAL_PROJECT_DIR}/OSXInstallNameChange.cmake
-    DEPENDEES install
-    WORKING_DIRECTORY <SOURCE_DIR>
-    LOG 1
-  )
-
-  ExternalProject_Add_Step(
-    ${EXTERNAL_NAME}
-    change-install-name-release
-    COMMENT "Calling install_name_tool on libraries to fix install name for dylib linking"
-    COMMAND ${CMAKE_COMMAND} -DINSTALL_NAME_LIBRARY_DIR=${INSTALL_NAME_LIBRARY_DIR}/Release -P ${EXTERNAL_PROJECT_DIR}/OSXInstallNameChange.cmake
-    DEPENDEES install
-    WORKING_DIRECTORY <SOURCE_DIR>
-    LOG 1
-  )
-endif ()
-
-
-string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
-
-if (WIN32)
-  set(${EXTERNAL_NAME_UPPER}_CORE_INCLUDE_DIRS ${INSTALL_DIR}/PolyVoxCore/include CACHE FILEPATH
-    "Path to polyvox core include directory")
-  set(${EXTERNAL_NAME_UPPER}_UTIL_INCLUDE_DIRS ${INSTALL_DIR}/PolyVoxUtil/include CACHE FILEPATH
-    "Path to polyvox util include directory")
-else ()
-  set(${EXTERNAL_NAME_UPPER}_CORE_INCLUDE_DIRS ${INSTALL_DIR}/include/PolyVoxCore CACHE FILEPATH
-    "Path to polyvox core include directory")
-  set(${EXTERNAL_NAME_UPPER}_UTIL_INCLUDE_DIRS ${INSTALL_DIR}/include/PolyVoxUtil CACHE FILEPATH
-    "Path to polyvox util include directory")
-endif ()
-
-
-if (WIN32)
-  set(${EXTERNAL_NAME_UPPER}_CORE_LIBRARY_DEBUG ${INSTALL_DIR}/PolyVoxCore/lib/Debug/PolyVoxCore.lib CACHE FILEPATH "polyvox core library")
-
-  # use generator expression to ensure the correct library is found when building different configurations in VS
-  set(_LIB_FOLDER "$<$<CONFIG:RelWithDebInfo>:PolyVoxCore/lib/RelWithDebInfo>")
-  set(_LIB_FOLDER "${_LIB_FOLDER}$<$<CONFIG:MinSizeRel>:build/library/PolyVoxCore/MinSizeRel>")
-  set(_LIB_FOLDER "${_LIB_FOLDER}$<$<OR:$<CONFIG:Release>,$<CONFIG:Debug>>:PolyVoxCore/lib/Release>")
-
-  set(${EXTERNAL_NAME_UPPER}_CORE_LIBRARY_RELEASE "${INSTALL_DIR}/${_LIB_FOLDER}/PolyVoxCore.lib" CACHE FILEPATH "polyvox core library")
-#  set(${EXTERNAL_NAME_UPPER}_UTIL_LIBRARY ${INSTALL_DIR}/PolyVoxUtil/lib/PolyVoxUtil.lib CACHE FILEPATH "polyvox util library")
-elseif (APPLE)
-  set(${EXTERNAL_NAME_UPPER}_CORE_LIBRARY_DEBUG ${INSTALL_DIR}/lib/Debug/libPolyVoxCore.dylib CACHE FILEPATH "polyvox core library")
-  set(${EXTERNAL_NAME_UPPER}_CORE_LIBRARY_RELEASE ${INSTALL_DIR}/lib/Release/libPolyVoxCore.dylib CACHE FILEPATH "polyvox core library")
-#  set(${EXTERNAL_NAME_UPPER}_UTIL_LIBRARY ${INSTALL_DIR}/lib/libPolyVoxUtil.dylib CACHE FILEPATH "polyvox util library")
-else ()
-  set(${EXTERNAL_NAME_UPPER}_CORE_LIBRARY_DEBUG ${INSTALL_DIR}/lib/Debug/libPolyVoxCore.so CACHE FILEPATH "polyvox core library")
-  set(${EXTERNAL_NAME_UPPER}_CORE_LIBRARY_RELEASE ${INSTALL_DIR}/lib/Release/libPolyVoxCore.so CACHE FILEPATH "polyvox core library")
-#  set(${EXTERNAL_NAME_UPPER}_UTIL_LIBRARY ${INSTALL_DIR}/lib/libPolyVoxUtil.so CACHE FILEPATH "polyvox util library")
-endif ()
diff --git a/cmake/externals/quazip/CMakeLists.txt b/cmake/externals/quazip/CMakeLists.txt
deleted file mode 100644
index 8190a35988..0000000000
--- a/cmake/externals/quazip/CMakeLists.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-set(EXTERNAL_NAME quazip)
-string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
-
-include(ExternalProject)
-
-set(QUAZIP_CMAKE_ARGS 
-    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} 
-    -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> 
-    -DCMAKE_PREFIX_PATH=${QT_CMAKE_PREFIX_PATH} 
-    -DCMAKE_INSTALL_NAME_DIR:PATH=<INSTALL_DIR>/lib 
-    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
-    -DZLIB_ROOT=${VCPKG_INSTALL_ROOT}
-    -DCMAKE_POSITION_INDEPENDENT_CODE=ON)
-
-if (NOT APPLE)
-  set(QUAZIP_CMAKE_ARGS ${QUAZIP_CMAKE_ARGS} -DCMAKE_CXX_STANDARD=11)
-endif ()
-
-ExternalProject_Add(
-  ${EXTERNAL_NAME}
-  URL "${EXTERNAL_BUILD_ASSETS}/dependencies/quazip-0.7.3.zip"
-  URL_MD5 ed03754d39b9da1775771819b8001d45
-  BINARY_DIR ${EXTERNAL_PROJECT_PREFIX}/build
-  CMAKE_ARGS ${QUAZIP_CMAKE_ARGS}
-  LOG_DOWNLOAD 1
-  LOG_CONFIGURE 1
-  LOG_BUILD 1
-)
-
-# Hide this external target (for ide users)
-set_target_properties(${EXTERNAL_NAME} PROPERTIES
-    FOLDER "hidden/externals"
-    INSTALL_NAME_DIR ${INSTALL_DIR}/lib
-    BUILD_WITH_INSTALL_RPATH True)
-
-ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
-set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIR ${INSTALL_DIR}/include CACHE PATH "List of QuaZip include directories")
-set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIRS ${${EXTERNAL_NAME_UPPER}_INCLUDE_DIR} CACHE PATH "List of QuaZip include directories")
-set(${EXTERNAL_NAME_UPPER}_DLL_PATH ${INSTALL_DIR}/lib CACHE FILEPATH "Location of QuaZip DLL")
-
-if (APPLE)
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/libquazip5.1.0.0.dylib CACHE FILEPATH "Location of QuaZip release library")
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/libquazip5d.1.0.0.dylib CACHE FILEPATH "Location of QuaZip release library")
-elseif (WIN32)
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/quazip5.lib CACHE FILEPATH "Location of QuaZip release library")
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/quazip5d.lib CACHE FILEPATH "Location of QuaZip release library")
-elseif (CMAKE_SYSTEM_NAME MATCHES "Linux")
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/libquazip5.so CACHE FILEPATH "Location of QuaZip release library")
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/libquazip5d.so CACHE FILEPATH "Location of QuaZip release library")
-else ()
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/libquazip5.so CACHE FILEPATH "Location of QuaZip release library")
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/libquazip5.so CACHE FILEPATH "Location of QuaZip release library")
-endif ()
-
-include(SelectLibraryConfigurations)
-select_library_configurations(${EXTERNAL_NAME_UPPER})
-
-# Force selected libraries into the cache
-set(${EXTERNAL_NAME_UPPER}_LIBRARY ${${EXTERNAL_NAME_UPPER}_LIBRARY} CACHE FILEPATH "Location of QuaZip libraries")
-set(${EXTERNAL_NAME_UPPER}_LIBRARIES ${${EXTERNAL_NAME_UPPER}_LIBRARIES} CACHE FILEPATH "Location of QuaZip libraries")
diff --git a/cmake/externals/vhacd/CMakeLists.txt b/cmake/externals/vhacd/CMakeLists.txt
deleted file mode 100644
index 5fb89b7e9b..0000000000
--- a/cmake/externals/vhacd/CMakeLists.txt
+++ /dev/null
@@ -1,40 +0,0 @@
-set(EXTERNAL_NAME vhacd)
-
-if (ANDROID)
-  set(ANDROID_CMAKE_ARGS "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}" "-DANDROID_NATIVE_API_LEVEL=19")
-endif ()
-
-include(ExternalProject)
-ExternalProject_Add(
-  ${EXTERNAL_NAME}
-  URL "${EXTERNAL_BUILD_ASSETS}/dependencies/v-hacd-master.zip"
-  URL_MD5 3bfc94f8dd3dfbfe8f4dc088f4820b3e
-  CMAKE_ARGS ${ANDROID_CMAKE_ARGS} -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
-  BINARY_DIR ${EXTERNAL_PROJECT_PREFIX}/build
-  LOG_DOWNLOAD 1
-  LOG_CONFIGURE 1
-  LOG_BUILD 1
-)
-
-# Hide this external target (for ide users)
-set_target_properties(${EXTERNAL_NAME} PROPERTIES FOLDER "hidden/externals")
-
-ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
-
-string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
-
-if (WIN32)
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG ${INSTALL_DIR}/lib/Debug/VHACD_LIB.lib CACHE FILEPATH "Path to V-HACD debug library")
-
-  # use generator expression to ensure the correct library is found when building different configurations in VS
-  set(_LIB_FOLDER "$<$<CONFIG:RelWithDebInfo>:build/src/VHACD_Lib/RelWithDebInfo>")
-  set(_LIB_FOLDER "${_LIB_FOLDER}$<$<CONFIG:MinSizeRel>:build/src/VHACD_Lib/MinSizeRel>")
-  set(_LIB_FOLDER "${_LIB_FOLDER}$<$<OR:$<CONFIG:Release>,$<CONFIG:Debug>>:lib/Release>")
-
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/${_LIB_FOLDER}/VHACD_LIB.lib CACHE FILEPATH "Path to V-HACD release library")
-else ()
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG "" CACHE FILEPATH "Path to V-HACD debug library")
-  set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/lib/libVHACD.a CACHE FILEPATH "Path to V-HACD release library")
-endif ()
-
-set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIRS ${INSTALL_DIR}/include CACHE FILEPATH "Path to V-HACD include directory")