diff --git a/CI/before_script.msvc.sh b/CI/before_script.msvc.sh
index 2a052912a..a0cf06919 100644
--- a/CI/before_script.msvc.sh
+++ b/CI/before_script.msvc.sh
@@ -613,8 +613,7 @@ fi
 			SUFFIX=""
 		fi
 
-		add_runtime_dlls "$(pwd)/bin/lib"{EGL,GLESv2}${SUFFIX}.dll \
-			"$(pwd)/bin/Qt5"{Core,Gui,Network,OpenGL,Widgets}${SUFFIX}.dll
+		add_runtime_dlls "$(pwd)/bin/Qt5"{Core,Gui,Network,OpenGL,Widgets}${SUFFIX}.dll
 		add_qt_platform_dlls "$(pwd)/plugins/platforms/qwindows${SUFFIX}.dll"
 
 		echo Done.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e81c502f6..d42097c96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -141,6 +141,8 @@ find_package(RakNet REQUIRED)
 include_directories(${RakNet_INCLUDES})
 
 # Dependencies
+find_package(OpenGL REQUIRED)
+
 if (USE_QT)
     message(STATUS "Using Qt${DESIRED_QT_VERSION}")
 
@@ -190,12 +192,6 @@ if (NOT WIN32 AND BUILD_WIZARD) # windows users can just run the morrowind insta
     set(OPENMW_USE_UNSHIELD TRUE)
 endif()
 
-option(OPENGL_ES "enable opengl es support" FALSE )
-
-if (OPENGL_ES)
-    add_definitions(-DOPENGL_ES)
-endif(OPENGL_ES)
-
 # Fix for not visible pthreads functions for linker with glibc 2.15
 if (UNIX AND NOT APPLE)
     find_package (Threads)
diff --git a/apps/openmw/mwrender/water.cpp b/apps/openmw/mwrender/water.cpp
index dbfee05df..6e1fef716 100644
--- a/apps/openmw/mwrender/water.cpp
+++ b/apps/openmw/mwrender/water.cpp
@@ -503,13 +503,11 @@ void Water::createSimpleWaterStateSet(osg::Node* node, float alpha)
 
     // use a shader to render the simple water, ensuring that fog is applied per pixel as required.
     // this could be removed if a more detailed water mesh, using some sort of paging solution, is implemented.
-#if !defined(OPENGL_ES) && !defined(ANDROID)
     Resource::SceneManager* sceneManager = mResourceSystem->getSceneManager();
     bool oldValue = sceneManager->getForceShaders();
     sceneManager->setForceShaders(true);
     sceneManager->recreateShaders(node);
     sceneManager->setForceShaders(oldValue);
-#endif
 }
 
 void Water::createShaderWaterStateSet(osg::Node* node, Reflection* reflection, Refraction* refraction)
diff --git a/cmake/FindOpenGLES.cmake b/cmake/FindOpenGLES.cmake
deleted file mode 100644
index 6a0466409..000000000
--- a/cmake/FindOpenGLES.cmake
+++ /dev/null
@@ -1,94 +0,0 @@
-#-------------------------------------------------------------------
-# This file is part of the CMake build system for OGRE
-#     (Object-oriented Graphics Rendering Engine)
-# For the latest info, see https://www.ogre3d.org/
-#
-# The contents of this file are placed in the public domain. Feel
-# free to make use of it in any way you like.
-#-------------------------------------------------------------------
-
-# - Try to find OpenGLES
-# Once done this will define
-#  
-#  OPENGLES_FOUND        - system has OpenGLES
-#  OPENGLES_INCLUDE_DIR  - the GL include directory
-#  OPENGLES_LIBRARIES    - Link these to use OpenGLES
-
-IF (WIN32)
-  IF (CYGWIN)
-
-    FIND_PATH(OPENGLES_INCLUDE_DIR GLES/gl.h )
-
-    FIND_LIBRARY(OPENGLES_gl_LIBRARY libgles_cm )
-
-  ELSE (CYGWIN)
-
-    IF(BORLAND)
-      SET (OPENGLES_gl_LIBRARY import32 CACHE STRING "OpenGL ES 1.x library for win32")
-    ELSE(BORLAND)
-	  #MS compiler - todo - fix the following line:
-      SET (OPENGLES_gl_LIBRARY ${OGRE_SOURCE_DIR}/Dependencies/lib/release/libgles_cm.lib CACHE STRING "OpenGL ES 1.x library for win32")
-    ENDIF(BORLAND)
-
-  ENDIF (CYGWIN)
-
-ELSE (WIN32)
-
-  IF (APPLE)
-
-	#create_search_paths(/Developer/Platforms)
-	#findpkg_framework(OpenGLES)
-    #set(OPENGLES_gl_LIBRARY "-framework OpenGLES")
-
-  ELSE(APPLE)
-
-    FIND_PATH(OPENGLES_INCLUDE_DIR GLES/gl.h
-      /opt/vc/include
-      /opt/graphics/OpenGL/include
-      /usr/openwin/share/include
-      /usr/X11R6/include
-      /usr/include
-    )
-
-    FIND_LIBRARY(OPENGLES_gl_LIBRARY
-      NAMES GLES_CM GLESv1_CM
-      PATHS /opt/vc/lib
-            /opt/graphics/OpenGL/lib
-            /usr/openwin/lib
-            /usr/shlib /usr/X11R6/lib
-            /usr/lib
-    )
-
-    # On Unix OpenGL most certainly always requires X11.
-    # Feel free to tighten up these conditions if you don't 
-    # think this is always true.
-
-    #IF (OPENGLES_gl_LIBRARY)
-    #  IF(NOT X11_FOUND)
-    #    INCLUDE(FindX11)
-    #  ENDIF(NOT X11_FOUND)
-    #  IF (X11_FOUND)
-    #    SET (OPENGLES_LIBRARIES ${X11_LIBRARIES})
-    #  ENDIF (X11_FOUND)
-    #ENDIF (OPENGLES_gl_LIBRARY)
-
-  ENDIF(APPLE)
-ENDIF (WIN32)
-
-SET( OPENGLES_FOUND "NO" )
-IF(OPENGLES_gl_LIBRARY)
-
-    SET( OPENGLES_LIBRARIES ${OPENGLES_gl_LIBRARY} ${OPENGLES_LIBRARIES})
-
-    SET( OPENGLES_FOUND "YES" )
-
-ENDIF(OPENGLES_gl_LIBRARY)
-
-MARK_AS_ADVANCED(
-  OPENGLES_INCLUDE_DIR
-  OPENGLES_gl_LIBRARY
-)
-
-INCLUDE(FindPackageHandleStandardArgs)
-
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(OPENGLES REQUIRED_VARS OPENGLES_LIBRARIES OPENGLES_INCLUDE_DIR)
diff --git a/components/CMakeLists.txt b/components/CMakeLists.txt
index 56373cdab..48e5aa4e8 100644
--- a/components/CMakeLists.txt
+++ b/components/CMakeLists.txt
@@ -26,14 +26,6 @@ else (GIT_CHECKOUT)
     configure_resource_file(${VERSION_IN_FILE} ${VERSION_FILE_PATH_BASE} ${VERSION_FILE_PATH_RELATIVE})
 endif (GIT_CHECKOUT)
 
-if(BUILD_OPENMW OR BUILD_OPENCS)
-    if (OPENGL_ES)
-        find_package(OpenGLES REQUIRED)
-    else()
-        find_package(OpenGL REQUIRED)
-    endif()
-endif(BUILD_OPENMW OR BUILD_OPENCS)
-
 # source files
 
 add_component_dir (settings
@@ -251,14 +243,6 @@ include_directories(${Bullet_INCLUDE_DIRS} ${CMAKE_CURRENT_BINARY_DIR})
 
 add_library(components STATIC ${COMPONENT_FILES} ${MOC_SRCS} ${ESM_UI_HDR})
 
-if(BUILD_OPENMW OR BUILD_OPENCS)
-    if (OPENGL_ES)
-        set(GL_LIB ${OPENGLES_gl_LIBRARY})
-    else()
-        set(GL_LIB ${OPENGL_gl_LIBRARY})
-    endif()
-endif(BUILD_OPENMW OR BUILD_OPENCS)
-
 target_link_libraries(components
     ${Boost_SYSTEM_LIBRARY}
     ${Boost_FILESYSTEM_LIBRARY}
@@ -275,8 +259,7 @@ target_link_libraries(components
     ${OSGANIMATION_LIBRARIES}
     ${Bullet_LIBRARIES}
     ${SDL2_LIBRARIES}
-    # For MyGUI platform
-    ${GL_LIB}
+    ${OPENGL_gl_LIBRARY}
     ${MyGUI_LIBRARIES}
     )
 
diff --git a/components/sdlutil/sdlgraphicswindow.cpp b/components/sdlutil/sdlgraphicswindow.cpp
index de82ca850..f9767238f 100644
--- a/components/sdlutil/sdlgraphicswindow.cpp
+++ b/components/sdlutil/sdlgraphicswindow.cpp
@@ -91,7 +91,7 @@ void GraphicsWindowSDL2::init()
     SDL_Window *oldWin = SDL_GL_GetCurrentWindow();
     SDL_GLContext oldCtx = SDL_GL_GetCurrentContext();
    
-#if defined(OPENGL_ES) || defined(ANDROID)
+#if defined(ANDROID)
     int major = 1;
     int minor = 1;
     char *ver = getenv("OPENMW_GLES_VERSION");
diff --git a/files/shaders/lighting.glsl b/files/shaders/lighting.glsl
index 7b8486fbe..06eebea68 100644
--- a/files/shaders/lighting.glsl
+++ b/files/shaders/lighting.glsl
@@ -47,8 +47,8 @@ vec3 getSpecular(vec3 viewNormal, vec3 viewDirection, float shininess, vec3 matS
 {
     vec3 lightDir = normalize(gl_LightSource[0].position.xyz);
     float NdotL = max(dot(viewNormal, lightDir), 0.0);
-    if (NdotL < 0)
-        return vec3(0,0,0);
+    if (NdotL < 0.0)
+        return vec3(0.,0.,0.);
     vec3 halfVec = normalize(lightDir - viewDirection);
-    return pow(max(dot(viewNormal, halfVec), 0.0), 128) * gl_LightSource[0].specular.xyz * matSpec;
+    return pow(max(dot(viewNormal, halfVec), 0.0), 128.) * gl_LightSource[0].specular.xyz * matSpec;
 }