The only thing I thought, but I do not consider it the right decision   if (abs(worldCoords.y) < 1.241) { finalColor = float3(0.0); }

The problem was in the tracking configuration let personSegmentation: ARWorldTrackingConfiguration.FrameSemantics = .personSegmentationWithDepth         if ARWorldTrackingConfiguration.supportsFrameSemantics(personSegmentation) {   configuration.frameSemantics.insert(personSegmentation)         } There were people on the video and setting up the tracking configuration made them occlusion.