Create Cinematic Slow-Motion: A Beginner’s Twixtor Workflow

How to Fix Artifacts in Twixtor — Quick Troubleshooting Guide

1) Inspect the source

• Stabilize shaky footage before Twixtor.
• Denoise / remove compression artifacts (temporal or spatial denoise).
• Fix single-frame defects (replace or splice good frames).

2) Adjust Twixtor settings

• Motion Sensitivity: lower to reduce warping; raise to reduce blending—keyframe per-problem area.
• Motion Vector Quality: try Best, then compare with No Motion Vectors for problem frames.
• Speed % / Output Control: avoid extreme retiming in one pass; split into smaller speed changes.

3) Use masking and layer separation

• Roto out fast-moving foreground objects and retime foreground/background separately.
• Provide clean plates or fill foreground holes when separating layers.
• If Twixtor Pro: supply foreground/background mattes or use user-defined track points.

4) Combine passes and compositing fixes

• Render two passes (Best vectors and No vectors) and replace bad regions from the No-vectors pass using a soft matte.
• Paint out small ghosts/warps on problem frames and reapply motion blur afterward.

5) Track points and manual guidance (Twixtor Pro)

• Add track points on reliable features and keyframe them frame-by-frame for occlusions or complex motion.
• Use imported motion vectors if available from another tool.

6) Post-process polishing

• Apply subtle motion blur (e.g., ReelSmart Motion Blur) after fixes to hide minor inconsistencies.
• Use temporal smoothing or small morph/blend to reduce flicker.

Quick checklist (try in order)

1. Stabilize → 2. Denoise → 3. Reduce Motion Sensitivity → 4. Test No Motion Vectors → 5. Separate layers/matte → 6. Paint/replace bad frames → 7. Add motion blur.

If you want, tell me the host app (After Effects, Premiere, Resolve) and a brief description of the artifact (ghosting