Found this thread in an attempt to fix ground clipping issues with VABB (Mumbai). Adjusting elevation in ADE does the job.
Kind of off-topic, but relevant to TropicalSim's LPPR: how did you get the autogen to show up around the airport? I just get bare terrain with a few trees here and there. Are you using ACM? I have the latest version of LPPR (for v4) available on Simmarket and told it not to install ACM during installation. I instead downloaded the latest ACM (for P3Dv5) from SceneryDesign.org, but having it installed doesn't seem to get me any autogen at LPPR. Would love to get it sorted out.