Are there any known hacks to get subsurface data into Google Earth?
Sub-ocean-surface works with the release of Google Ocean, but you cannot go below the sea floor.
Possible approaches might be
- Find the default image and replace it with a transparent PNG
- Capture the network requests to download tiles and respond with transparent PNGs
- Convince GE to set the Level of Detail (LOD) for the primary layer to some negative or infinite value.
On OS X, I think the following folder/code looks promising:
cd Google Earth.app/Contents/MacOS/shaders $ ls atmosphere_ground_sun_off* atmosphere_ground_sun_off.arbfp1 atmosphere_ground_sun_off.asd atmosphere_ground_sun_off.ps_2_0 atmosphere_ground_sun_off.arbvp1 atmosphere_ground_sun_off.cfg atmosphere_ground_sun_off.vs_2_0
Those files appear to contain assembly code instructions to the graphics card, and there is mention of "groundTexture", "groundRayleighMap", and other possible hack-able things.