Here is a technique for landscape photography involving less than sharp images:
https://www.youtube.com/watch?v=T2rGplgQ3cA&feature=em-uploademailOn the main Hog Forum find it here:
https://www.uglyhedgehog.com/t-597790-1.htmlThere are other ways to get to techniques that alter images using changes in camera technique. I can't post on the Main Hog Forum because these involve figure work. You need not use figure work, that is your call.
First off, I am using a red semi transparent drape over the door entrance in late afternoon full summer sun illuminating the cloth covered door that looks out from my building. The 'door' is a rot iron steel structure that would be called burglar bars. The crushed red velvet drape covers the opening and provides a backdrop that can not be seen through except were you will see tiny round spots, these are worn spots about the size of half dollars.
Next, the camera is anchored to a heavy tripod. The zoom lens is focused on the model and I'm using a well stopped down f stop.
The sun is PART of the light source but in addition I have two flash heads illuminating the front of the scene. The flash heads and sunlight are about equally balanced in out put.
I am using a flash trigger that I can discharge at anytime during the exposure. The camera shutter speeds vary between 1/2 second to several seconds (about 5 seconds maximum).
This is experimental and vary optional in creating a final result.
Exposure is based on two effects that are done separately and in combination. The camera is anchored down and pretty much rock solid. The two main variables are zooming the lens during the exposure both forward and reverse. The other option is rolling the focus of the lens forward and back.
Note that these altering can be done quickly or slowly, even a quick change at any given point during the exposure. Additional option variable is to fire the flash at different times both during an initial change in zoom or/and focus.
The possibilities are amazing in their variants.
Other subject matter could be images of birds like a humming bird at a feeder, and many others.
Have fun with a day of experimenting!