1. Fix bug in initialization process that caused failures.

2. Fix bug in group initialization when opening a .blend file inside a child group.

1) Improved attribute visualization: distant attributes will fade out gradually.

2) Added camera-based and distance-based attribute culling.

1) Improve heavy scenes initialization performance

2) Add orange→red highlight for long preview renders and deprioritize them in the next render iteration cycle

Improve cleanup of temp files in background process

Fix incorrect updating of modifier input defaults