This page is made to serve an overview of missing environmental textures, which likely are stock textures.
It's plausible this page might be missing some environmental textures, but here's the major missing textures at least.
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The sky in the FMV. -
The sky as shown in the manual, which uses a different texture. -
A render of the in-game version of LEGO Island, featuring the water texture with an unknown bump map. It seems to use some form of a bump map. -
A rock with an unknown texture. -
The cliff texture used in-game. -
The water texture used in the game. -
The cave floor used in the game. -
The sand used in the game. -
The grass used in the game. -
The "pebbles" texture used in the game.