I přes fotografii je rozhodnutí stejné.

Here i přes means despite or even in spite of.

It is a fixed expression in Czech that introduces a contrast:

• i přes fotografii = despite the photograph / even considering the photograph

So i here is not simply and. In this pattern, i přes + accusative means something like despite.

That is a very common question. Yes, i can mean and, but it can also mean even.

In i přes, it helps create the meaning despite / even despite. So you should learn i přes as a unit.

Compare:

• Petr i Jana přišli. = Petr and Jana came.
• I přes déšť jsme šli ven. = Even despite the rain / Despite the rain, we went outside.

So in your sentence, i is not joining two nouns. It is part of the concessive expression i přes.

Because přes takes the accusative case, and i přes keeps that same case.

The base noun is:

• fotografie = photograph

Its singular accusative form is:

• fotografii

So:

• i přes fotografii

This is one of the things Czech learners have to memorize: certain prepositions require certain cases, and přes requires the accusative.

Yes, přes often literally means across, over, or through, for example:

• Jdu přes most. = I am going across the bridge.
• Vidím přes okno. = I can see through the window.

But in the expression i přes, it has an idiomatic meaning: despite.

So this is a good example of how a preposition can have both a literal meaning and a more abstract one depending on the context.

Because rozhodnutí is a neuter singular noun, and the adjective has to agree with it.

• rozhodnutí = decision
• grammatical gender: neuter
• number: singular

So the adjective stejný has to match:

• masculine singular: stejný
• feminine singular: stejná
• neuter singular: stejné

That is why the sentence has:

• rozhodnutí je stejné

Because the subject is rozhodnutí, which is singular.

• rozhodnutí = decision
• one decision = singular
• therefore je = is

If it were plural, you would get:

• Rozhodnutí jsou stejná. = The decisions are the same.

So je simply agrees with the singular subject.

It is nominative, because it is the subject of the sentence.

You are right that the form is the same. For many neuter nouns in Czech, the nominative and accusative singular are identical.

In this sentence:

• rozhodnutí = the thing that is
• therefore it is the subject
• so it is nominative

Meanwhile:

• fotografii comes after i přes
• so that one is accusative

Yes, Czech word order is flexible.

This version puts i přes fotografii first, which gives it emphasis:

• Despite the photograph, the decision is the same.

You could also say:

• Rozhodnutí je i přes fotografii stejné.

That sounds a bit more neutral in structure, though the exact emphasis changes.

In Czech, the beginning of the sentence often sets the scene or highlights the contrast. So putting i přes fotografii first is very natural if that contrast is important.

Because Czech has no articles like a or the.

Whether something is understood as a decision, the decision, a photograph, or the photograph is decided by context.

So:

• rozhodnutí can mean a decision or the decision
• fotografie / fotografii can mean a photograph or the photograph

This is normal in Czech and often feels strange to English speakers at first.

The sentence is understandable and grammatically fine. A native speaker could say it, especially in a formal or analytical context.

Possible alternatives depend on nuance:

• Navzdory fotografii je rozhodnutí stejné.
• I s fotografií je rozhodnutí stejné.
• Ani fotografie rozhodnutí nezměnila.

These are not exactly identical:

• i přes fotografii stresses despite that evidence / despite that factor
• navzdory fotografii is a bit more formal
• i s fotografií can mean even with the photograph included
• ani fotografie rozhodnutí nezměnila means even the photograph did not change the decision

So your original sentence is fine; the alternatives just shift the tone slightly.

Yes, but the tone changes.

• fotografie = photograph, more neutral or formal
• fotka = photo, more informal and conversational

So you could say:

• I přes fotku je rozhodnutí stejné.

That sounds more casual. The grammar stays the same:

• fotka is feminine
• after i přes, it would also be accusative singular: fotku

So the choice depends mostly on style.