Когда они познакомились, они поняли

Когда они познакомились, они поняли, что их интересы совпадают и решили создать общую студию, в которой создавали свои картины

Результаты (английский) 1:

When they met, they realized that their interests coincide and decided to create a public Studio that created his paintings

Результаты (английский) 2:

When they met, they realized that their interests coincide, and decided to create a common studio, which created their paintings

Результаты (английский) 3:

When they met, they realized that their interests are identical and have decided to create a common studio, which created their paintings