So reduzieren sich seine Motive oft

So reduzieren sich seine Motive oftmals auf einzelne Gegenstände, die er monumental in Szene setzt.

Results (English) 1:

So his motives reduce often on individual items it is monumental in scene.

Results (English) 2:

So his motives often reduce individual items that it sets monumental in Scene.

Results (English) 3:

To reduce his motives often on individual objects which he monumental scene.