The answer is
thanks to @Deusovi himself in the comments. It did cross my mind, but I didn't find a convincing explanation, especially one that would fit the hints:
I think the answer is
Previous partial answer:
Ideas that don't work:
Here are three puzzles with $3$ visual images, each being $2\times 2$ Raven matrices:
This last one is a little more unique, but quite easy like the previous ones:
I cannot find such a puzzle with just $2$ visual designs. I guess it is unlikely because the more objects there are in the puzzle, the more specific the pattern. Like, I might have the sequence $...
No. The rectangle has an area of $75$ square units. The only other rectangle with integer sides that would have the same area would be $3*25$ (or $1*75$ technically, I guess).
The rectangles you have are $3*6, 2*3, 3*2, 2*4, 4*2, 10*2$ and $9*1$. The $9*1$ needs a $9*2$ paired with it to fill those rows and prevent leaving a $1*x$ space that cannot be ...