Game performance concerning model imported as a .obj mesh versus .dae scene

some_lame_kid

I modeled a house in Blender and imported it to Godot as a .dae to animate the doors opening. For whatever reason, it stutters when rendered in game, but not in the editor. When I imported it again as .obj, no stuttering. I don't have a clue what's going on. If someone could explain, I would appreciate it.

Megalomaniak

The answer might be in your own title here: obj mesh vs dae scene

some_lame_kid

I had the thought that it had something to do with it being a scene of 9 mesh instances. I copied all the meshes from the exported scene to their own scene and the stuttering was in fact there.

What's the difference between 9 mesh instances and 1 mesh instance when both equal the same amount of vertices?

some_lame_kid

Discovered something new. It stutters if any mesh at all no matter how simple is imported as a scene instead of a mesh.

some_lame_kid

I don't know what I did but that scene stutters when rendering anything, and on starting a new project, it doesn't seem to be a problem. Even the dae thing doesn't cause stutter. I stripped the original scene to the most barebones skeleton of what it was, with only the player and a cube mesh. It stutters. I created a new scene, exact same node set up, and it doesn't stutter.

some_lame_kid

I did more experimenting and came up with a pattern. With a normal scene with just the player and a cube mesh, there is no stutter. Once I add the .dae with material added to it, it begins the stutter when it comes on camera. I delete it, add a cube mesh and the stutter returns. I add material to the cube and the stutter disappears I undo back to the first cube and the stutter returns. I remove the material from the original cube mesh and the stutter is gone I'm completely clueless.

cybereality

You probably want to use glTF. Both obj and dae are obsolete formats. In any case, a door animation could be done in Godot itself, and that is a better way to do it. Such as with AnimationPlayer or with a Tween.

some_lame_kid

You're right, and anyway I figured out what the pattern really is. It stutters when the camera shows something that has no material if the frame before has mesh with proper material. The reverse seems to happen as well. Not a clue why it happens but if this is true, it's probably not a problem.