diff --git a/binaries/data/mods/public/shaders/glsl/bloom.xml b/binaries/data/mods/public/shaders/glsl/bloom.xml
index 2f901bb5f6..04a000f049 100644
--- a/binaries/data/mods/public/shaders/glsl/bloom.xml
+++ b/binaries/data/mods/public/shaders/glsl/bloom.xml
@@ -4,6 +4,8 @@
     <vertex file="glsl/hdr.vs">
         <stream name="pos"/>
         <stream name="uv0"/>
+        <attrib name="a_vertex" semantics="gl_Vertex"/>
+        <attrib name="a_uv0" semantics="gl_MultiTexCoord0"/>
     </vertex>
 
     <fragment file="glsl/bloom.fs"/>
diff --git a/binaries/data/mods/public/shaders/glsl/hdr.vs b/binaries/data/mods/public/shaders/glsl/hdr.vs
index a4acbb9885..be50844f1f 100644
--- a/binaries/data/mods/public/shaders/glsl/hdr.vs
+++ b/binaries/data/mods/public/shaders/glsl/hdr.vs
@@ -2,9 +2,12 @@
 
 varying vec2 v_tex;
 
+attribute vec3 a_vertex;
+attribute vec2 a_uv0;
+
 void main()
 {  
-  gl_Position = gl_Vertex;  
+  gl_Position = vec4(a_vertex, 1.0);  
 
-  v_tex = vec2(gl_MultiTexCoord0);
+  v_tex = a_uv0;
 }
diff --git a/binaries/data/mods/public/shaders/glsl/los_interp.vs b/binaries/data/mods/public/shaders/glsl/los_interp.vs
index 56c3169d0f..df72569f0c 100644
--- a/binaries/data/mods/public/shaders/glsl/los_interp.vs
+++ b/binaries/data/mods/public/shaders/glsl/los_interp.vs
@@ -13,7 +13,7 @@ varying vec2 v_los;
 
 void main()
 {  
-  gl_Position = gl_Vertex;  
+  gl_Position = vec4(a_vertex, 1.0);
 
-  v_tex = vec2(gl_MultiTexCoord0);
+  v_tex = a_uv0;
 }
diff --git a/source/graphics/LOSTexture.cpp b/source/graphics/LOSTexture.cpp
index e2b8d07734..61a13e8843 100644
--- a/source/graphics/LOSTexture.cpp
+++ b/source/graphics/LOSTexture.cpp
@@ -148,22 +148,33 @@ void CLOSTexture::InterpolateLOS()
 	
 	shader->Uniform(str_delta, (float)g_Renderer.GetTimeManager().GetFrameDelta() * 4.0f, 0.0f, 0.0f, 0.0f);
 	
-#if CONFIG2_GLES
-#warning TODO: fix CLOSTexture::InterpolateLOS for GLES (avoid GL_QUADS/glPushAttrib)
-#else
-	glPushAttrib(GL_VIEWPORT_BIT); 
 	glViewport(0, 0, m_TextureSize, m_TextureSize);
 	
-	glBegin(GL_QUADS);
-	    glColor4f(1.f, 1.f, 1.f, 1.f);
-	    glTexCoord2f(1.0, 1.0);	glVertex2f(1,1);
-	    glTexCoord2f(0.0, 1.0);	glVertex2f(-1,1);	    
-	    glTexCoord2f(0.0, 0.0);	glVertex2f(-1,-1);
-	    glTexCoord2f(1.0, 0.0);	glVertex2f(1,-1);
-	glEnd();
+	float quadVerts[] = {
+		1.0f, 1.0f,
+		-1.0f, 1.0f,
+		-1.0f, -1.0f,
+
+		-1.0f, -1.0f,
+		1.0f, -1.0f,
+		1.0f, 1.0f
+	};
+	float quadTex[] = {
+		1.0f, 1.0f,
+		0.0f, 1.0f,
+		0.0f, 0.0f,
+
+		0.0f, 0.0f,
+		1.0f, 0.0f,
+		1.0f, 1.0f
+	};
+	shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, quadTex);
+	shader->VertexPointer(2, GL_FLOAT, 0, quadVerts);
+	shader->AssertPointersBound();
+	glDrawArrays(GL_TRIANGLES, 0, 6);
 	
-	glPopAttrib(); 
-#endif
+	glViewport(0, 0, g_xres, g_yres);
+
 	shader->Unbind();
 	m_smoothShader->EndPass();
 	
diff --git a/source/renderer/PostprocManager.cpp b/source/renderer/PostprocManager.cpp
index 5eefcb4249..c0526c1491 100644
--- a/source/renderer/PostprocManager.cpp
+++ b/source/renderer/PostprocManager.cpp
@@ -195,18 +195,33 @@ void CPostprocManager::ApplyBlurDownscale2x(GLuint inTex, GLuint outTex, int inW
 	
 	shader->BindTexture(str_renderedTex, renderedTex);
 	
-	glPushAttrib(GL_VIEWPORT_BIT); 
 	glViewport(0, 0, inWidth / 2, inHeight / 2);
 	
-	glBegin(GL_QUADS);
-	    glColor4f(1.f, 1.f, 1.f, 1.f);
-	    glTexCoord2f(1.0, 1.0);	glVertex2f(1,1);
-	    glTexCoord2f(0.0, 1.0);	glVertex2f(-1,1);	    
-	    glTexCoord2f(0.0, 0.0);	glVertex2f(-1,-1);
-	    glTexCoord2f(1.0, 0.0);	glVertex2f(1,-1);
-	glEnd();
+	float quadVerts[] = {
+		1.0f, 1.0f,
+		-1.0f, 1.0f,
+		-1.0f, -1.0f,
+
+		-1.0f, -1.0f,
+		1.0f, -1.0f,
+		1.0f, 1.0f
+	};
+	float quadTex[] = {
+		1.0f, 1.0f,
+		0.0f, 1.0f,
+		0.0f, 0.0f,
+
+		0.0f, 0.0f,
+		1.0f, 0.0f,
+		1.0f, 1.0f
+	};
+	shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, quadTex);
+	shader->VertexPointer(2, GL_FLOAT, 0, quadVerts);
+	shader->AssertPointersBound();
+	glDrawArrays(GL_TRIANGLES, 0, 6);
+
+	glViewport(0, 0, g_xres, g_yres);
 	
-	glPopAttrib(); 
 	tech->EndPass();
 }
 
@@ -227,18 +242,33 @@ void CPostprocManager::ApplyBlurGauss(GLuint inOutTex, GLuint tempTex, int inWid
 	shader->BindTexture(str_renderedTex, inOutTex);
 	shader->Uniform(str_texSize, inWidth, inHeight, 0.0f, 0.0f);
 	
-	glPushAttrib(GL_VIEWPORT_BIT); 
 	glViewport(0, 0, inWidth, inHeight);
 	
-	glBegin(GL_QUADS);
-	    glColor4f(1.f, 1.f, 1.f, 1.f);
-	    glTexCoord2f(1.0, 1.0);	glVertex2f(1,1);
-	    glTexCoord2f(0.0, 1.0);	glVertex2f(-1,1);
-	    glTexCoord2f(0.0, 0.0);	glVertex2f(-1,-1);
-	    glTexCoord2f(1.0, 0.0);	glVertex2f(1,-1);
-	glEnd();
-	
-	glPopAttrib(); 
+	float quadVerts[] = {
+		1.0f, 1.0f,
+		-1.0f, 1.0f,
+		-1.0f, -1.0f,
+
+		-1.0f, -1.0f,
+		1.0f, -1.0f,
+		1.0f, 1.0f
+	};
+	float quadTex[] = {
+		1.0f, 1.0f,
+		0.0f, 1.0f,
+		0.0f, 0.0f,
+
+		0.0f, 0.0f,
+		1.0f, 0.0f,
+		1.0f, 1.0f
+	};
+	shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, quadTex);
+	shader->VertexPointer(2, GL_FLOAT, 0, quadVerts);
+	shader->AssertPointersBound();
+	glDrawArrays(GL_TRIANGLES, 0, 6);
+
+	glViewport(0, 0, g_xres, g_yres);
+
 	tech->EndPass();
 	
 	// Set result texture as our render target.
@@ -258,18 +288,15 @@ void CPostprocManager::ApplyBlurGauss(GLuint inOutTex, GLuint tempTex, int inWid
 	shader->BindTexture(str_renderedTex, tempTex);
 	shader->Uniform(str_texSize, inWidth, inHeight, 0.0f, 0.0f);
 	
-	glPushAttrib(GL_VIEWPORT_BIT); 
 	glViewport(0, 0, inWidth, inHeight);
 	
-	glBegin(GL_QUADS);
-	    glColor4f(1.f, 1.f, 1.f, 1.f);
-	    glTexCoord2f(1.0, 1.0);	glVertex2f(1,1);
-	    glTexCoord2f(0.0, 1.0);	glVertex2f(-1,1);
-	    glTexCoord2f(0.0, 0.0);	glVertex2f(-1,-1);
-	    glTexCoord2f(1.0, 0.0);	glVertex2f(1,-1);
-	glEnd();
-	
-	glPopAttrib(); 
+	shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, quadTex);
+	shader->VertexPointer(2, GL_FLOAT, 0, quadVerts);
+	shader->AssertPointersBound();
+	glDrawArrays(GL_TRIANGLES, 0, 6);
+
+	glViewport(0, 0, g_xres, g_yres);
+
 	tech->EndPass();
 }
 
@@ -392,13 +419,28 @@ void CPostprocManager::ApplyEffect(CShaderTechniquePtr &shaderTech1, int pass)
 	shader->Uniform(str_saturation, g_LightEnv.m_Saturation);
 	shader->Uniform(str_bloom, g_LightEnv.m_Bloom);
 	
-	glBegin(GL_QUADS);
-	    glColor4f(1.f, 1.f, 1.f, 1.f);
-	    glTexCoord2f(1.0, 1.0);	glVertex2f(1,1);
-	    glTexCoord2f(0.0, 1.0);	glVertex2f(-1,1);	    
-	    glTexCoord2f(0.0, 0.0);	glVertex2f(-1,-1);
-	    glTexCoord2f(1.0, 0.0);	glVertex2f(1,-1);
-	glEnd();
+	float quadVerts[] = {
+		1.0f, 1.0f,
+		-1.0f, 1.0f,
+		-1.0f, -1.0f,
+
+		-1.0f, -1.0f,
+		1.0f, -1.0f,
+		1.0f, 1.0f
+	};
+	float quadTex[] = {
+		1.0f, 1.0f,
+		0.0f, 1.0f,
+		0.0f, 0.0f,
+
+		0.0f, 0.0f,
+		1.0f, 0.0f,
+		1.0f, 1.0f
+	};
+	shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, quadTex);
+	shader->VertexPointer(2, GL_FLOAT, 0, quadVerts);
+	shader->AssertPointersBound();
+	glDrawArrays(GL_TRIANGLES, 0, 6);
 	
 	shader->Unbind();