[TODO] Complete implementation in mesh/oldsrc/Babylon.lisp

This file contains TODO comments for pending work:

**File:** `mesh/oldsrc/Babylon.lisp`

**Items to complete:**
- Line 86: ;;; TODO: Profile the playback frame rate. If quality is unacceptable,

**Priority:** Medium
**Labels:** enhancement

Open mesh/oldsrc/Babylon.lisp and inspect the TODO at line 86, which calls for profiling playback frame rate and evaluating quality. First determine the relevant playback path and how frame rate and quality are measured; the issue does not define a target or specific implementation, so completion criteria need clarification.

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