Firecracker00 said:
I never knew that they couldn’t film at the place where the lake is, strange I don’t recall hearing this on any JP documentary of behind the scene.

Do you know where these open matte versions have come from, how do people get hold of these which won’t be released on any home video copy?

They couldn’t film inside the ranch as it was private property and the owner did not allow. So, they took a still photo and animated it digitally. If you have the ‘Beyond Jurassic Park’ DVD or the Trilogy Blu-ray, then you’ll find a documentary on the VFX of the trilogy where this information is available.

If you search with the right keywords, I think you can find it. As for a legal copy, the open matte versions of Jurassic Park 1, 2 and 3 are available as “Fullscreen” DVDs from Universal home video. They are not fully open matte though. The matted shots are panned and scanned as per the available image area.