- Extract precorr_ra, accum_ra, cuas_gaussian_ra in locateAndFreezeTargetsMulti
- Compute fpixels_accum (LPF with cuas_accum_ra) for shiftAndRenderAccumulate in both loops
- Compute fpixels_refine (LPF with cuas_precorr_ra) for refineMotionVectors
- Both use Gaussian or running-average depending on cuas_gaussian_ra flag
- When ra==1, LPF is a no-op (passes fpixels_tum through unchanged)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>