I wouldn't recommend to work with 3d in Photoshop: with anything beyond a put a cylinder for perspective you'll get grey hair in no time. I believe what you're looking for is NPR (Non Photo Realistic) rendering which can be achieved in different ways: from complex shaders to more simple matcaps and viewport filters. Here's an example from a free Blender (I'...
The 2020 is an effected image layer on the base image. It uses blending modes to make an illusion of 3D shading, but the perspective distortion is missing, so the image is still flat.
We can create the effect in Photoshop with layer styles and blending mode Hard Light:
The background image cannot have large white areas because they would make highlights ...
The saturation of red is reduced. The reduction can be done with Photoshop's Hue & Saturation adjustment because it can be adjusted to affect more to red than other colors. If you test it, you will notice that it causes an harmuful artefact on the face, but that's fixed by inserting hair.
That can in theory be a random incident, the hair supplement can ...
Yes, you certainly can!
It's called a vector mask, when you use a path as the mask.
Draw a vector path with the pen tool, and click Layer > Vector Mask > Current Path
If you already have a vector shape on its own layer, put the image on a layer above and Alt/Option+click between the two layers to clip the image to the shape below.
Yes, that's called a mask. You have a layer with the glitter image, another layer with the vector shape, and with these you can create a mask: