When can "très" modify a noun?

Question

The following is a sentence in a grammar textbook¹ :

Il s’agit maintenant de faire très attention.
We/You should be very careful now.

It surprised me that "très" could be used to modify a noun ("attention")! I had thought that "très" could only modify an adjective or another adverb.

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This website says that:

"You can use très in front of adjectives, adverbs, and even certain nouns, such as those that refer to feelings but use avoir—"to be."

and it gives a single example of très modifying a noun:

J'ai très faim. > I am very hungry.

But I note that this explanation doesn't apply to the first sentence I quoted in this question ("Il s'agit maintenant de faire très attention"); that sentence isn't referring to a feeling, and doesn't use avoir.

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Looking at the WordReference page for "très", I see three expressions where "très" seems to modify a noun:

• avoir très envie de faire [qch]
• être très famille
• être très femme

But, I don't see "avoir très faim" or "faire très attention" in this list.

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So, I'm wondering, when is "très" allowed to modify a noun? Can it actually modify any noun? Or does it basically modify a noun only in fixed expressions (and that I should consider "faire très attention" and "avoir très faim" as fixed expressions)?

Can you give some example sentences where "très" is used to modify a noun?

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^{1. Monique L'Huiller, "Advanced French Grammar", p. 255}

Answer 1

Très can modify any noun as long as this noun represent something with some characteristics that allow it to be used adjectivally.

eg.

Si on prend une région très Macron - la Bretagne -, en réalité, c'est très Macron à Rennes et un peu moins dans les zones rurales. Europe 1

Je trouve que Baker fait très chauffeur de maître., Roger Borniche, Le Gringo, 2014.

However, the fact très can modify any noun doesn't mean it can be used anywhere arbitrarily.

For example this pop-corn label from @Luke's comment doesn't make sense in French:

At least, it should have read Saveur très beurre to stay grammatical but even that phrasing is unlikely to have been retained by the marketing department.

Proper translations might be:

Maïs à éclater au bon goût de beurre

or

Maïs à éclater (goût) extra-beurre.