C_GlobalWarp produces a preview stitch using metadata, passed downstream from a C_CameraSolver, to help minimize ghosting in overlap regions. C_GlobalWarp includes controls to adjust a stitch to line up key features and allows you to add constraints to reduce warping on known straight lines in the rectilinear input images.

Results from C_CameraSolver.

Reduced ghosting after C_GlobalWarp.

Global warping relies on solve data and should be performed before stitching the solved camera output together, so ideally, place C_GlobalWarp between C_CameraSolver and C_Stitcher.

Tip:  CaraVR contains an example end-to-end workflow in Nuke's toolbar under CaraVR 2.1 > Toolsets > Full Pipeline.