diff --git a/examples/render_groups/main.cpp b/examples/render_groups/main.cpp
index cd2e233..d6e5e19 100644
--- a/examples/render_groups/main.cpp
+++ b/examples/render_groups/main.cpp
@@ -112,6 +112,18 @@ doFrameCallbackPre(render_state* rs)
 		square.world_transform * glm::vec4(10000, 0, -1000, 1));
 	rs->lights->needs_update = true;
 #endif
+	static input_state is = {};
+	inputProcessEvents(&is);
+
+	if (is.window_closed || is.escape) {
+		rs->running = false;
+		return;
+	}
+
+	static float angle = 1.2 / 60; // NOTE: 60 FPS
+	static glm::vec3 axis(0, 1, 0);
+	entity* spaceship = &rs->render_groups->groups[0].entities[0];
+	entRotate(spaceship, angle, axis);
 }
 
 int
@@ -124,6 +136,7 @@ main()
 		return 1;
 	}
 
+#if 0
 	cameraInitPerspective(
 		rs->cam,
 		glm::vec3(0, -2000, 0),
@@ -134,7 +147,6 @@ main()
 	renAddLight(rs, glm::vec3());
 	renAddLight(rs, glm::vec3());
 
-#if 0
 	// FIXME: this introduces a potential buffer overrun. Need to implement
 	//	a memory manager for render_groups, eg:
 	//		renPushGroup(rs, new_group)
@@ -191,25 +203,41 @@ main()
 	assert(ret != nullptr);
 #endif
 
+	cameraInitPerspective(
+		rs->cam,
+		glm::vec3(0, 0, -50),
+		glm::vec3(0, 0, 0),
+		glm::vec3(0,1,0)
+	);
+
 	// NOTE: testing entity system with new asset structures
 	// FIXME: remove mesh.h, mesh.cpp
-	// FIXME: need a debug shader that shows geometry and normals
 	// FIXME: remove platform_wait_for_vblank
+	// FIXME: clean up examples with new asset system
+	// FIXME: merger render_group_fix branch back into master
 	// FIXME: make a test case for overflowing default array sizes, rg->assets
 	// 	rg_info->groups, render_group->enitities
 	// FIXME: look for glm::mat4 in structs, and replace with pointers
 	// FIXME: better shader abstraction, see below
 	shader_wrapper sw = { DEFAULT_SHADER, rs->default_shader, nullptr };
 	render_group* rg = rgAlloc(rs->render_groups, 64, sw);
+
+#if 0
 	entity* e =
 		rgAppend(rg, rs->assets, rs->arena, "../data/blender/spaceship.gltf");
-		//rgAppend(rg, rs->assets, rs->arena, "../data/blender/icosphere.gltf");
-	uint scale = 200;
-	entScale(*e, glm::vec3(scale, scale, scale));
 	assert(e != nullptr);
+	uint scale = 4;
+	//entRotate(e, -1 * M_PI_2, glm::vec3(1, 0, 0));
+#else
+	entity* e =
+		rgAppend(rg, rs->assets, rs->arena, "../data/blender/icosphere.gltf");
+	assert(e != nullptr);
+	uint scale = 20;
+#endif
+	entScale(*e, glm::vec3(scale, scale, scale));
 
-	renDoRenderLoop(rs, 60);
-	//renRenderFrame(rs);
+	//renDoRenderLoop(rs, 60);
+	renDoRenderLoop(rs, 60, doFrameCallbackPre);
 
 	renShutdown(rs);
 	return 0;