For a first-time offender there is definitely no risk of prison if its about pure material damage. Every case is unique as the judge also decides based on the offender's personal background, financial situation, behavior, etc.
The internet is full of information about the 1300 euro threshold, however, note that the police estimate is very decisive here. Even if the damage estimate is well above 1300, what is important is whether the offender could have noticed such high damage. Therefore, even if one is accused with a damage above 1300 euros, if the police estimate is below that threshold one still has a good chance of keeping their license and receiving a relatively small fine.