Why are there sometimes gaps at the edges when performing cross-block flattening on DJI Modify?

Name: heliguy
Address: Unit 9, Jupiter Court Orion Business Park North Shields Tyne & Wear NE29 7SE, GB
Telephone: 0191 296 1024

When DJI Modify flattens mutiple blocks it processes each block independently, this might result in height discreppenicies between blocks.