Anyone who does computer graphics knows about polygons and the mesh that is made of them. For those who don't I'm posting these images to show part of the process used to create my 3d images.
Below is an image that shows the original Hi resolution mesh I sculpted and the Low res mesh I made as well. Notice all the little squares that make up the hydrant. These are polygons. On the right they are very large and cannot hold much detail. It is these that we push and pull, and slide around to form a shape. Actually it's the tiny points where each line crosses another that you control. The more of them, the more detail you can achieve. look at the samples on the left. At this magnification it's still hard to see them.
Below is an image that shows the original Hi resolution mesh I sculpted and the Low res mesh I made as well. Notice all the little squares that make up the hydrant. These are polygons. On the right they are very large and cannot hold much detail. It is these that we push and pull, and slide around to form a shape. Actually it's the tiny points where each line crosses another that you control. The more of them, the more detail you can achieve. look at the samples on the left. At this magnification it's still hard to see them.
So, why bother making two of the same objects? An object made of 1.72 million poly's slows down the computer. So another mesh is built to accept texture maps that were made on the original Hi res object. These maps bring out all the detail of your sculpt and when wrapped around the lighter, Low Res geometry it appears just as detailed as the original. It's like taking a photo of a killer, designer home and wrapping it around a box in the alley. What a makeover!
This is my first map. It shows a rusty, grimy surface that will only show through holes in the next map of simulated paint. Those holes will be made to look like chips and scratches in the paint.
So, here's a small test render I did using these methods. It's just the main body of the fire hydrant, I still have to put all the bolts/valves/handles and chain on. Those parts will all go through the same process individually.
This is why I cringed a little when I wanted to add a small detail in the background of my tarped tree image. Sure I can just Photoshop a hydrant in there, but this is what I do - and I just love it!
Can't wait for the next "small detail" !!