But only one of those companies, DuPont, is physically based there.

但这些公司中只有杜邦公司总部设在那里。

Luckily, the VFX artists had the advantage of new technology: a physically based ray-tracing system partly developed at Pixar.

幸运的是，视觉特效艺术家拥有新技术的优势：部分由皮克斯开发的基于物理的光线追踪系统。