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Hi, I'm trying to draw line primitives using FFP. I've been following the FFP demo under the systems folder, so I made a plugin, added it to my engine. It seems the best I can do is to get a white box to draw for one frame and then they go away. Help? Thanks I replaced the ::render method in the FFP demo with the code below. Like I said, I see a white box for one frame or so and then its gone...like it's overdrawn by my scene or something. void render(float time) { App *app = App::get(); Ffp *ffp = Ffp::get(); // screen size int width = app->getWidth(); int height = app->getHeight(); ffp->enable(Ffp::MODE_SOLID); ffp->setOrtho(width, height); ffp->beginLines(); ffp->addLines(4); ffp->addVertex(0, 0, 0); ffp->setColor(1.0f, 1.0f, 1.0f, 1.0f); ffp->addVertex(0, 100, 0); ffp->addVertex(100, 100, 0); ffp->addVertex(100, 0, 0); ffp->addIndex(0); ffp->addIndex(1); ffp->addIndex(1); ffp->addIndex(2); ffp->addIndex(2); ffp->addIndex(3); ffp->addIndex(3); ffp->addIndex(0); ffp->endLines(); ffp->disable(); }