Here are two different methods to dynamically blur the edges of a shape.
Method 1: Gaussian blur a Smart Object
Right-click the layer and select Convert to Smart Object to convert your layer to a Smart Object and enable applying filters dynamically.
Enter Filter > Blur > Gaussian Blur to apply blur to the layer. Press OK when done.
Now a Gaussian blur ...
Compositing can be more difficult than it may appear. At least if you are seeking a believable composite. I think your sample is okay, but not great. Some angles aren't really correct and the shadowing/lighting could be a bit better. But it's not a "bad" composite overall.
You can easily find thousands of examples related to poor compositing.
Just a ...
Have a few separate complete pieces of proper plants or leafs as images with transparent background. Have several copies in different sizes and rotation angles (see NOTE1). Place them until you have enough, do not clip a maze, because the edges would be wrong.
You may need also pieces which are squeezed vertically or horizontally to simulate watching ...
I would use Illustrator, because vector shapes are there handled much more easily and there's no need to worry the resolution.
But everything is possible also in Photoshop, the handling is only more complex. You must make careful selections or use vector masks.
I drew a polygon, made a smaller copy, made a hole by subtracting and splitted the resulted ring ...
There is a way to do this. It's takes a few steps, but can easily be recorded as an action.
Photoshop doesn't support HSL color natively, so first of all you need to download and install the HSB/HSL Filter from Adobe's site.
The filter changes an ordinary RGB image so the red, green and blue channels represent hue, saturation and lightness instead. It will ...
Duplicate your layer (this is destructive)
Filter > Other > HSB/HSL
Input RGB, Row Order HSB or HSL (up to you)
The image will now look distorted as the R, G & B channels are represented as H, S, L/B respectively
Invert the Green (now Saturation) channel
Select RGB (all) channels
Convert back to RGB using the same filter, just reversed (...
You should have a photo which contains a slice of glossy pipe or bent sheet metal. It can have a reflection of another parallel curved metal surface or the sheet should have quite complex bending.
The photo can be stretched to the wanted height and darkened to suit for your purposes. Too much stretching isn't good because all imperfections start to look ...
I threw a super-fast answer together in the application I had open, which was Affinity Designer - but the exact same approach would work in either Photoshop or Illustrator.
Linear gradients, with enough stops to allow the necessary variation - one per page.
Black paper texture image over the top, this one set to colour dodge.
Black paper texture image ...