Ugly renders. Increase your samples, max bounces, and max render time (or whatever is equivalent to these in your environment). Title page is also not designed well. It's unreadable from a thumbnail size and the fonts are disgusting. The 3d scene also looks very plain and boring: * Make the lighting more dramatic so that it has some contrast, maybe make the whole scene darker and add a street light that adds a nice hazy illumination to the attacker and leaves the rest of the scene in near darkness. * A slight DOF effect on the viewer and background might help draw the eyes to the attacker, which you clearly intend to be the focal point of the scene. * The camera is too far from the attacker, bring them in closer so the viewer gets a better look. There is too much dead space to the sides of the frame.
Otherwise, the models and materials all look at least decent and the PBR looks alright from what I can see with the settings you rendered at. So far the title page is the worst page of the lot.
Base +6, greatlakes100 +6, anotherSkyrimer +3, toto_ -25
I admit that, partly, you're right, the cover wasn't very good, Though I doubt, that the other images fit that description
I had it 3 days to render, the maximum time. I'm not an expert in light effects either, so far everything I know, I learned on my own, without the help of guides. . . who have helped me little or nothing. And translators like google. . . well..., they're more treacherous than Judas. But with a 14-year-old PC, you can't ask for more, even though you'd expect something less. Not everyone can have a state-of-the-art computer that works 12 times faster than my computer. I, can't afford it right now.
I don't really understand how you can go 14 years without at least getting enough money for a new graphics card, but everyone's situation is different. Assuming of course you've had it for 14 years, because who would buy a computer like that with expectations to do rendering... Look into cloud GPU rendering. Rates are affordable pretty much across the board. A couple bucks and you'll have a page with much nicer lighting. I've raised my review score. Keep going.
Yes, I changed the card, an nvidia 720 (better..., I couldn't afford it), And bought this pc to design 3D objects for printing, the rendering pictures came two years ago.
I looked at the clouds about a month ago, but paying 6-10 euros per image, right now, is not viable for me. If the situation improves in the near future, maybe. . . next year. . . who knows.