My 2c: I think Niwi is name of the set, and Vilvoh is clearly the author So, copyright=vilvoh seems the right solution, while Niwi could go into name prefix (if used at all?).
Okies. I'll use copyright=vilvoh
Ah, I forgot, Raven did some other early locos too. They are maybe even easier to fix (pixelwise) and have more consistent style.
This set looks like it has a really nice set of older rolling stock, and might require less work to "fix."
I immediately noticed one of the locomotives looks like it might be the Adler, and another looks like it might be something similar to a Rocket. I will have to run it a bit in-game to determine what changes I'll have to make to it.
I can post a pic on my page of the 4-4-0 American if you really want to see it, even though the sprites aren't finished yet.
Of course, premature posting tends to lead to me not really finishing things.
[Edit] Wow! Someone put bunches of work in to this set! Pixel Art vs Rendering
I know this might make someone upset, but I have noticed there is a huge difference between rendering and shrinking an image versus drawing it pixel-by-pixel. Rendering makes sense for bigger images, where you won't lose too much of the detail. But Pak64 is, by modern standards, absolutely tiny!
The very small size of these sprites means getting them to look right very difficult. It is really impressionist (painters) work, rather than photographic (renderers).
Rendering can give you a decent source image to work with, but the details are lost or appear distorted at these small sizes.
For example, my 4-4-0 American I'm working on has an area six pixels wide and four pixels high, and in this area, on one of the isometric images, I need to show the front truck or bogey, the piston, the valve gear, cow catcher, and parts of the boiler. On this particular American (1837), the cow catcher is wood. That's quite a bit to manage in just twenty-four pixels!
Up close (400%) the image looks almost nothing like what it represents. When you zoom out, it manages to imply what is intended. Furthermore, a properly done impressionist sprite is kinda' difficult to scale up. Not only are the details not really there, but there's a certain degree of distortion necessary to make it "look right" with so little actual information.
I've always marveled at this facet of impressionism.
But the small size is also why I enjoy working on Pak64. For me, it's easier to use a mouse to change and move around individual pixels than it is for me to draw large, sweeping images. I don't have the tools for making large pictures, and even if I did, I'm not entirely certain I'd be comfortable using them. My artistic training was mostly in Composition, Drawing with Pencils, and Painting. So the digital media really doesn't suit me very well.
That being said, I am actually very happy to work on Simutrans sprites because it gives me an opportunity to use and improve a skill set I have which, like cleaning reel-to-reel data tapes, I thought was long ago outdated.