for (int i=0; i<12; i++) {
	Mesh_tile *t = &main_mesh->tile[i];
	if (t->projection->visible) {
		glColor3f(t->projection->colour[0], t->projection->colour[1], t->projection->colour[2]);
		Vector2 *c[5] = {&t->corner[0]->projection->v, &t->corner[1]->projection->v, &t->corner[2]->projection->v, &t->corner[3]->projection->v, &t->corner[4]->projection->v};
		glBegin(GL_TRIANGLE_FAN);
		glVertex2f(t->projection->v.x, t->projection->v.y);
		glVertex2f(c[0]->x, c[0]->y);
		glVertex2f(c[1]->x, c[1]->y);
		glVertex2f(c[2]->x, c[2]->y);
		glVertex2f(c[3]->x, c[3]->y);
		glVertex2f(c[4]->x, c[4]->y);
		glVertex2f(c[0]->x, c[0]->y);
		glEnd();
	}
}
for (int i=12; i<main_mesh->tiles; i++) {
	Mesh_tile *t = &main_mesh->tile[i];
	if (t->projection->visible) {
		glColor3f(t->projection->colour[0], t->projection->colour[1], t->projection->colour[2]);
		Vector2 *c[6] = {&t->corner[0]->projection->v, &t->corner[1]->projection->v, &t->corner[2]->projection->v, &t->corner[3]->projection->v, &t->corner[4]->projection->v, &t->corner[5]->projection->v};
		glBegin(GL_TRIANGLE_FAN);
		glVertex2f(t->projection->v.x, t->projection->v.y);
		glVertex2f(c[0]->x, c[0]->y);
		glVertex2f(c[1]->x, c[1]->y);
		glVertex2f(c[2]->x, c[2]->y);
		glVertex2f(c[3]->x, c[3]->y);
		glVertex2f(c[4]->x, c[4]->y);
		glVertex2f(c[5]->x, c[5]->y);
		glVertex2f(c[0]->x, c[0]->y);
		glEnd();
	}
}