Okay, so let me explain v2d as if you were a five-year-old. Imagine you have a piece of paper and you draw a picture on it with a pen. That picture is 2D, which means it's flat and only has two dimensions: height and width.
Now, if you were to take that drawing and make it 3D, you would add depth to it. So, instead of just being a flat picture, it would now have a third dimension: thickness.
V2D is kind of like a mix of those two things. It's a way to make a 2D picture look like it has depth and is 3D. Think of it like when you put on those funny glasses at the movie theater and suddenly things pop out at you. V2D works the same way, but instead of using glasses, it uses special software to add depth to the 2D image.
So, if you were looking at a V2D picture of a tree for example, you might see the trunk of the tree look like it's closer to you than the leaves on top. Even though it's still a 2D image, it looks like it has more depth and is more realistic.
Overall, V2D is a cool way of making 2D images look more 3D and giving them a sense of depth, without actually making them 3D.