Recent update removes the dependency on WDBRipper

I think the answer is SI-EDIT

No, SI-Edit can't open WORLD.WDB

No, I used WDBRipper for reference on how MOD files work. It got most things right, but I fixed all the mistakes it did and made material generation more accurate to the game.

Hello, MattKC Forums! I came back here to show my new tool called "LIMOD2OBJ", a.k.a. "Lego Island MOD To OBJ". This tool allows you to convert all kinds of .MOD files from the final game into .OBJ format. You can get those from a few .SI files or from WDBRipper in the bin folder. The tool can be ...

I might release it soon, but now I'm trying to understand how characters become invisible (aka disappear) in animations.

I have private messaged ya, reply me there. I'll try to help you with that.

You can edit textures, they're basically flipped BMPs in WORLD.WDB

I made a script for Unity to convert LEGO Island's ANI into Unity's ANIM in Unity Runtime, works almost perfect. Requires Actors to exist in Resources/Actors folder.
I don't know if I should upload it somewhere in public right now, as it's unfinished

I managed to replace some textures in game, they are so simple. It's basic BMP 8 BIT, but flipped.