patch background renderer on dev

firefox: <img width="1632" height="718" alt="Image" src="https://github.com/user-attachments/assets/e20168f9-a3b1-4432-9942-b8cbf8fd8244" />

chrome: <img width="818" height="518" alt="Image" src="https://github.com/user-attachments/assets/3b0a0773-b196-470d-a9fa-98a0cde6ed2d" />

both fine on cables.gl