diff --git a/code/nel/src/3d/driver/opengl/driver_opengl_material.cpp b/code/nel/src/3d/driver/opengl/driver_opengl_material.cpp
index 9dd08a51f..c7bc0d35d 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl_material.cpp
+++ b/code/nel/src/3d/driver/opengl/driver_opengl_material.cpp
@@ -35,10 +35,18 @@ static void convBlend(CMaterial::TBlend blend, GLenum& glenum)
 		case CMaterial::srccolor:	glenum=GL_SRC_COLOR; break;
 		case CMaterial::invsrccolor:glenum=GL_ONE_MINUS_SRC_COLOR; break;
 		// Extended Blend modes.
+#ifdef USE_OPENGLES
+		case CMaterial::blendConstantColor:		glenum=GL_CONSTANT_COLOR; break;
+		case CMaterial::blendConstantInvColor:	glenum=GL_ONE_MINUS_CONSTANT_COLOR; break;
+		case CMaterial::blendConstantAlpha:		glenum=GL_CONSTANT_ALPHA; break;
+		case CMaterial::blendConstantInvAlpha:	glenum=GL_ONE_MINUS_CONSTANT_ALPHA; break;
+#else
 		case CMaterial::blendConstantColor:		glenum=GL_CONSTANT_COLOR_EXT; break;
 		case CMaterial::blendConstantInvColor:	glenum=GL_ONE_MINUS_CONSTANT_COLOR_EXT; break;
 		case CMaterial::blendConstantAlpha:		glenum=GL_CONSTANT_ALPHA_EXT; break;
 		case CMaterial::blendConstantInvAlpha:	glenum=GL_ONE_MINUS_CONSTANT_ALPHA_EXT; break;
+#endif
+
 		default: nlstop;
 	}
 }
@@ -242,7 +250,9 @@ void CDriverGL::setTextureShaders(const uint8 *addressingModes, const CSmartPtr<
 		if (glAddrMode != _CurrentTexAddrMode[stage]) // addressing mode different from the one in the device?
 		{
 			_DriverGLStates.activeTextureARB(stage);
+#ifndef USE_OPENGLES
 			glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, glAddrMode);
+#endif
 			_CurrentTexAddrMode[stage] = glAddrMode;
 		}
 	}
@@ -1971,7 +1981,9 @@ void		CDriverGL::endCloudMultiPass()
 	nlassert(_CurrentMaterial->getShader() == CMaterial::Cloud);
 	if (ATICloudShaderHandle)
 	{
+#ifndef USE_OPENGLES
 		glDisable(GL_FRAGMENT_SHADER_ATI);
+#endif
 	}
 }
 
@@ -1989,7 +2001,9 @@ sint CDriverGL::beginWaterMultiPass()
   */
 void CDriverGL::setupWaterPassR200(const CMaterial &mat)
 {
-	H_AUTO_OGL(CDriverGL_setupWaterPassR200)
+	H_AUTO_OGL(CDriverGL_setupWaterPassR200);
+
+#ifndef USE_OPENGLES
 	uint k;
 	ITexture *tex = mat.getTexture(0);
 	if (tex)
@@ -2061,6 +2075,7 @@ void CDriverGL::setupWaterPassR200(const CMaterial &mat)
 		float cst[4] = { 1.f, 1.f, 1.f, 0.f };
 		nglSetFragmentShaderConstantATI(GL_CON_0_ATI, cst);
 	}
+#endif
 }
 
 // ***************************************************************************
@@ -2068,7 +2083,9 @@ void CDriverGL::setupWaterPassR200(const CMaterial &mat)
   */
 void CDriverGL::setupWaterPassARB(const CMaterial &mat)
 {
-	H_AUTO_OGL(CDriverGL_setupWaterPassARB)
+	H_AUTO_OGL(CDriverGL_setupWaterPassARB);
+
+#ifndef USE_OPENGLES
 	uint k;
 	ITexture *tex = mat.getTexture(0);
 	if (tex)
@@ -2147,6 +2164,7 @@ void CDriverGL::setupWaterPassARB(const CMaterial &mat)
 			}
 		}
 	}
+#endif
 }
 
 // ***************************************************************************
@@ -2175,6 +2193,7 @@ void CDriverGL::setupWaterPassNV20(const CMaterial &mat)
 {
 	H_AUTO_OGL(CDriverGL_setupWaterPassNV20)
 
+#ifndef USE_OPENGLES
 	static bool setupDone = false;
 	static CMaterial::CTexEnv texEnvReplace;
 	static CMaterial::CTexEnv texEnvModulate;
@@ -2259,6 +2278,7 @@ void CDriverGL::setupWaterPassNV20(const CMaterial &mat)
 		activateTexEnvMode(2, texEnvReplace);
 		activateTexEnvMode(3, texEnvModulate);
 	}
+#endif
 }
 
 // ***************************************************************************
@@ -2286,7 +2306,9 @@ void CDriverGL::setupWaterPass(uint /* pass */)
 // ***************************************************************************
 void CDriverGL::endWaterMultiPass()
 {
-	H_AUTO_OGL(CDriverGL_endWaterMultiPass)
+	H_AUTO_OGL(CDriverGL_endWaterMultiPass);
+
+#ifndef USE_OPENGLES
 	nlassert(_CurrentMaterial->getShader() == CMaterial::Water);
 	// NB : as fragment shaders / programs bypass the texture envs, no special env enum is added (c.f CTexEnvSpecial)
 	if (_Extensions.NVTextureShader) return;
@@ -2298,6 +2320,7 @@ void CDriverGL::endWaterMultiPass()
 	{
 		glDisable(GL_FRAGMENT_SHADER_ATI);
 	}
+#endif
 }
 
 } // NL3D
diff --git a/code/nel/src/3d/driver/opengl/driver_opengl_states.h b/code/nel/src/3d/driver/opengl/driver_opengl_states.h
index 9a8aa3e4f..e3820c4a8 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl_states.h
+++ b/code/nel/src/3d/driver/opengl/driver_opengl_states.h
@@ -20,11 +20,15 @@
 #include "nel/misc/types_nl.h"
 #include "nel/3d/vertex_buffer.h"
 
-#ifdef NL_OS_MAC
-#	define GL_GLEXT_LEGACY
-#	include <OpenGL/gl.h>
+#ifdef USE_OPENGLES
+#	include <GLES/gl.h>
 #else
-#	include <GL/gl.h>
+#	ifdef NL_OS_MAC
+#		define GL_GLEXT_LEGACY
+#		include <OpenGL/gl.h>
+#	else
+#		include <GL/gl.h>
+#	endif
 #endif
 
 
@@ -41,7 +45,7 @@ namespace NL3D
 			- GL_ALPHA_TEST
 			- GL_LIGHTING
 			- GL_LIGHT0 + i .....
-			- GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP_ARB.
+			- GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP_ARB/OES.
 			- GL_TEXTURE_GEN_S, GL_TEXTURE_GEN_T, GL_TEXTURE_GEN_R
 			- GL_COLOR_MATERIAL
 			- GL_FOG
diff --git a/code/nel/src/3d/driver/opengl/driver_opengl_texture.cpp b/code/nel/src/3d/driver/opengl/driver_opengl_texture.cpp
index 6079dc6f3..f3e59c65e 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl_texture.cpp
+++ b/code/nel/src/3d/driver/opengl/driver_opengl_texture.cpp
@@ -155,7 +155,11 @@ bool CTextureDrvInfosGL::initFrameBufferObject(ITexture * tex)
 
 		// check status
 		GLenum status;
+#ifdef USE_OPENGLES
+		status = (GLenum) nglCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
+#else
 		status = (GLenum) nglCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+#endif
 		switch(status) {
 			case GL_FRAMEBUFFER_COMPLETE_EXT:
 				InitFBO = true;
@@ -204,12 +208,24 @@ bool CTextureDrvInfosGL::initFrameBufferObject(ITexture * tex)
 		// clean up resources if allocation failed
 		if (!InitFBO)
 		{
+#ifdef USE_OPENGLES
+			nglDeleteFramebuffersOES(1, &FBOId);
+#else
 			nglDeleteFramebuffersEXT(1, &FBOId);
+#endif
 			if (AttachDepthStencil)
 			{
+#ifdef USE_OPENGLES
+				nglDeleteRenderbuffersOES(1, &DepthFBOId);
+#else
 				nglDeleteRenderbuffersEXT(1, &DepthFBOId);
+#endif
 				if(!UsePackedDepthStencil)
+#ifdef USE_OPENGLES
+					nglDeleteRenderbuffersOES(1, &StencilFBOId);
+#else
 					nglDeleteRenderbuffersEXT(1, &StencilFBOId);
+#endif
 			}
 		}
 
@@ -226,14 +242,22 @@ bool CTextureDrvInfosGL::activeFrameBufferObject(ITexture * tex)
 		if(initFrameBufferObject(tex))
 		{
 			glBindTexture(TextureMode, 0);
+#ifdef USE_OPENGLES
+			nglBindFramebufferOES(GL_FRAMEBUFFER_OES, FBOId);
+#else
 			nglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, FBOId);
+#endif
 		}
 		else
 			return false;
 	}
 	else
 	{
+#ifdef USE_OPENGLES
+		nglBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
+#else
 		nglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+#endif
 	}
 
 	return true;
@@ -840,8 +864,13 @@ bool CDriverGL::setupTextureEx (ITexture& tex, bool bUpload, bool &bAllUploaded,
 							sint	size= tex.getPixels(i).size();
 							if (bUpload)
 							{
+#ifdef USE_OPENGLES
+								glCompressedTexImage2D (GL_TEXTURE_2D, i-decalMipMapResize, glfmt,
+															tex.getWidth(i),tex.getHeight(i), 0, size, ptr);
+#else
 								nglCompressedTexImage2DARB (GL_TEXTURE_2D, i-decalMipMapResize, glfmt,
 															tex.getWidth(i),tex.getHeight(i), 0, size, ptr);
+#endif
 								bAllUploaded = true;
 							}
 							else
diff --git a/code/nel/src/3d/driver/opengl/driver_opengl_vertex_buffer_hard.cpp b/code/nel/src/3d/driver/opengl/driver_opengl_vertex_buffer_hard.cpp
index 3c74d02b4..ba471b8dd 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl_vertex_buffer_hard.cpp
+++ b/code/nel/src/3d/driver/opengl/driver_opengl_vertex_buffer_hard.cpp
@@ -69,7 +69,7 @@ IVertexBufferHardGL::~IVertexBufferHardGL()
 	H_AUTO_OGL(IVertexBufferHardGL_IVertexBufferHardGLDtor)
 }
 
-
+#ifndef USE_OPENGLES
 
 // ***************************************************************************
 // ***************************************************************************
@@ -1133,7 +1133,7 @@ void CVertexArrayRangeMapObjectATI::updateLostBuffers()
 	}
 #endif
 
-
+#endif // USE_OPENGLES
 
 
 // ***************************************************************************
@@ -1328,6 +1328,12 @@ CVertexBufferHardARB::CVertexBufferHardARB(CDriverGL *drv, CVertexBuffer *vb) :
 	#ifdef NL_DEBUG
 		_Unmapping = false;
 	#endif
+
+#ifdef USE_OPENGLES
+	_Buffer = NULL;
+	_BufferSize = 0;
+	_LastBufferSize = 0;
+#endif
 }
 
 // ***************************************************************************
@@ -1369,6 +1375,14 @@ CVertexBufferHardARB::~CVertexBufferHardARB()
 			_VertexArrayRange->_MappedVBList.erase(_IteratorInMappedVBList);
 		}
 	#endif
+
+#ifdef USE_OPENGLES
+	if (_Buffer)
+	{
+		delete [] _Buffer;
+		_Buffer = NULL;
+	}
+#endif
 }
 
 // ***************************************************************************
@@ -1450,6 +1464,39 @@ void *CVertexBufferHardARB::lock()
 		beforeLock= CTime::getPerformanceTime();
 	}
 	_Driver->_DriverGLStates.bindARBVertexBuffer(_VertexObjectId);
+
+#ifdef USE_OPENGLES
+	if (_Driver->_Extensions.OESMapBuffer)
+	{
+		_VertexPtr = nglMapBufferOES(GL_ARRAY_BUFFER, GL_WRITE_ONLY_OES);
+		if (!_VertexPtr)
+		{
+			nglUnmapBufferOES(GL_ARRAY_BUFFER);
+			nlassert(glIsBuffer(_VertexObjectId));
+			invalidate();
+			return &_DummyVB[0];
+		}
+	}
+	else
+	{
+		const uint size = VB->getNumVertices() * VB->getVertexSize();
+
+		if (size > _BufferSize)
+		{
+			if (_Buffer) delete [] _Buffer;
+
+			_Buffer = new uint8[size+3];
+			_BufferSize = size;
+		}
+
+		uint8 offset = (size_t)_Buffer % 4;
+
+		if (offset > 0) offset = 4 - offset;
+
+		_VertexPtr = _Buffer + offset;
+		_LastBufferSize = size;
+	}
+#else
 	_VertexPtr = nglMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
 	if (!_VertexPtr)
 	{
@@ -1458,6 +1505,8 @@ void *CVertexBufferHardARB::lock()
 		invalidate();
 		return &_DummyVB[0];
 	}
+#endif
+
 	#ifdef NL_DEBUG
 		_VertexArrayRange->_MappedVBList.push_front(this);
 		_IteratorInMappedVBList = _VertexArrayRange->_MappedVBList.begin();
diff --git a/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp b/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp
index 48af6cf05..eb3083729 100644
--- a/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp
+++ b/code/nel/src/3d/driver/opengl/driver_opengl_window.cpp
@@ -2376,11 +2376,15 @@ void CDriverGL::getWindowSize(uint32 &width, uint32 &height)
 	if (_CurrentMode.OffScreen)
 	{
 #ifdef NL_OS_WINDOWS
+
+#ifndef USE_OPENGLES
 		if (_PBuffer)
 		{
 			nwglQueryPbufferARB( _PBuffer, WGL_PBUFFER_WIDTH_ARB, (int*)&width );
 			nwglQueryPbufferARB( _PBuffer, WGL_PBUFFER_HEIGHT_ARB, (int*)&height );
 		}
+#endif
+
 #endif
 	}
 	else