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What is the meaning of "もとになった"?

Here is the sentence in which I find this expression:

> **もとになった** 鳥山先生のイラストはDB大全集第６番182ページ掲載.

Maybe simply, (this illustration) _originally_ was published on [...]?

For more context:

[![https://i.imgur.com/f8bLhA1.jpg](https://i.stack.imgur.com/OZDVul.jpg)](https://i.stack.imgur.com/OZDVu.jpg)
CC BY-SA 3.0
2017-09-05T15:06:43.377
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2017-09-05T19:25:52.510
2017-09-05T19:25:52.510
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expressions
What is the meaning of "もとになった"?
It means:

the _original_ illustration was published in ...

The version here is an altered/modified version based on the original
illuatration.

[Weblio](http://ejje.weblio.jp/content/%E3%82%82%E3%81%A8%E3%81%AB%E3%81%AA%E3%82%8B)
translates もとになる as "become the basis". Here "もとになった" is used to modify
"鳥山先生のイラスト". So it literally means:  
The illustration of Mr. Toriyama that became/is the basis (of this
illustration) ...
CC BY-SA 3.0
2017-09-05T15:20:35.063
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answer
If X is the もと of Y, it means X is the original that Y was based on. So in
this case, the もとになった…イラスト would be the illustration that the pictured cel was
based on. (Presumably the pictured illustration is from a cel created by Toei,
and the もとになったイラスト would be the illustration by Toriyama that's mentioned in
the passage above.)
CC BY-SA 3.0
2017-09-05T15:23:25.680
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