It’s just one of those days. I have nothing really new to show, but I actually did a lot of work on this thing today.
One thing I absolutely despise and will not tolerate to the point of going to great lengths to get rid of them are smoothing errors. They’re ugly. I had a few around my aft section window cuts last night, but not too bad. Minor things, but I knew they were there. So, I bisected in some geometry to fix it. The geometry itself is ugly, but who cares? It’s not like the wireframe matters, it’s what the thing looks like rendered that matters. So, this morning I was doing some renders with different lighting hitting that part to make sure there were no more lingering errors. While I was happy to see none there, there was a major issue around the back of the model, where the back of the trenches and the shuttlebay openings are.
I turns out the booleans tool in Blender has a major issue. Well, all booleans tools do, but this is a particular quirk of Blender, it also happens on the Knife Project tool. It turns out, when you cut into a plane, the booleans (or knife project) doesn’t create flat, even geometry. It cuts the new geometry a fraction off of the level of the existing geometry, leading to smoothing errors when rendering. When you’re dealing with a face that’s lined up with one of the 3 axes used in the 3D space, that’s not an issue. You simply go around and manually realign the points to be level. That worked great for the top of the back of the saucer. Unfortunately, when you’re dealing with angled planes, like the ones found on the back edge of the saucer, things get trickier.
I fought with the existing geometry for a good couple hours or more. I tried the Edge Split modifier and all kinds of things, nothing got rid of the errors. So, I finally realized that the offensive geometry had to go and that I needed to start over. Fortunately, I’m anal about saving stuff to new files when I do things like cuts, so I just had to open a second Blender window, open the uncut file and copy and past the sections I needed over to replace the messed up geometry. That’s where it got even more fun.
I tried re-cutting the geometry using the Knife Project tool, that’s where I found out it does the same thing booleans does. So, I wound up through a series of bisects, insets, extrusions, and whatnot, getting the elements I wanted back in there, without using either the booleans or knife project. It was a giant pain in the butt, but worth it in the end because there are no freaking smoothing errors. It’s all clean and it looks beautiful rendered.
So, after a long day of frustration, this is all I have for tonight. While they may look like last night’s renders, there are differences you don’t see. And, now that I’m done with that and I’m mentally drained, it’s time for some XBOX 360. I’m going to go take out a day’s worth of frustration on some thugs in Gotham City. 😉