VFX Compositing and Cleanup: Facial Paintout Nightmare

Original source is EXR sequence No Audio
Paint out of a practical bullet effect and fixing lighting on a forehead.
Extremely difficult track. Total scene was 6 shots and about 1000 frames.
Syntheyes for solve.
Houdini for 3D. (Lighting, sculpting, texturing, tracking fixes)
Redshift for Shading and rendering.
Nuke for Comp, plus BG paint work to reshape the forehead.
Mocha for some tracking and some roto.