How to place the Thingmaks

I know about it is important to understand the environment around the ThingMark should have a lot of saliency,interesting features,texture.

That is means stickers, complex parts ,cables, dirt and rust are good examples of salient features.

But if we need match the real product that has plain colored areas and highly transparent with the  whole body，what should I do？where can I put the ThingMark?giri​Ankit Gupta​Imran Bagwan​Qadir umar​

THANK YOU A LOT FOR YOUR REPLY~