For "composition" as in the act of creating:
* Compositive - This refers to the act or process of composing.
* Composite - This can refer to something made up of different parts.
* Compositional - This focuses on the structure and arrangement of elements within a composition.
For "composition" as in a piece of work (e.g., a musical composition, a literary composition):
* Composed - This describes something that has been created or written.
* Composite - This can also be used here, especially if the work combines different elements or styles.
Other possibilities:
* Compositing - This describes the act of combining different images or elements to create a single image.
* Compositional - This can also be used to describe the overall structure and arrangement of elements within a composition, regardless of its medium.
The best adjective to use will depend on the specific context of your sentence.