Create a scene ,dispose it and continue render

Questions
1

I wonder what would make the difference if I create a scene, dispose it or not dispose it, and continue to render.

I did this experiment and it seems to be no different, after the buffer data is released and the render will continue to create the new buffer

2

I find the answer in document.
If the scene needs to remain active, this operation is not required, and it take a negative performance

What happens when I call dispose() and then use the respective object at a later point?

The deleted internal resources will be created again by the engine. So no runtime error will occur but you might notice a negative performance impact for the current frame, especially when shader programs have to be compiled.

3

tl;dr version: any resource (scene / texture / geometru) that’s disposed from the GPU - will be re-created on the next attempt to render it.

That’s also why it’s important to first do .removeFromParent on a mesh - only after that dispose the materials and textures assigned to that mesh. Otherwise you’ll be creating a memory leak on the GPU.

4

Thanks for reminding that. I’ve never noticed this before

5

Actually, the .removeFromParent and the .dispose just need to be on the same side of the renderer.render.