Issue #4: Now really clearing with 0 alpha

src/modules/graphics/opengl/Framebuffer.cpp

@@ -236,8 +236,8 @@ namespace opengl
 		// bind buffer and clear screen
 		glPushAttrib(GL_VIEWPORT_BIT | GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		strategy->bindFBO(fbo);
-		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		glClearColor(.0f, .0f, .0f, .0f);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		glViewport(0, 0, width, height);
 
 		// indicate we are using this fbo