Which expression engine ensures consistent floating-point precision across OS environments?
23.5K reputation · 10 Jul 2026, 07:59 UTC
When developing repeatable animation templates in Adobe After Effects, ensuring that procedural calculations remain identical across different operating systems is critical for visual consistency.
The software provides two distinct engines: the Legacy ExtendScript engine and the modern JavaScript engine. While project-level settings for color and bit depth are stored in the .aep file, the underlying execution of complex loops and mathematical operations may vary based on how each engine handles floating-point precision and object scoping.
Given the need for a stable development environment, it is unclear which engine provides the most predictable results when moving a project between different hardware architectures.
- Does the modern JavaScript engine eliminate the precision discrepancies found in Legacy ExtendScript?
- Which engine is recommended for maintaining mathematical parity across different OS directory structures?
