Graphics, Figures & Tables ⇒ Organize pictures / add pictures without rendering

[thinki]

How to declare/define pictures without actually showing them in the rendered document?
So i have a mechanism that can redisplay graphics equations and so on and i want to use this mechanism to organitze my document.

The problem is: before i can use a picture i have to label it (above the first use of the label) and to label it i have to declare my picture which means it will be rendered one time before i can reuse it:

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pic = picture 1 %can't declare it later because then the references will throw an error but i don't want the graphic to show here (just register the graphic without displaying)

some text pic some text %don't want to declare here because it's horrible to read

look at this picture pic
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i am searching for a way to now declare this picture without displaying it so i can have a seperate file with just picture declarations