I didn't mean Photoshop; I meant pure software like Blender or DAZ Studio. And maybe it sounds incredible, but I am writing to you about real numbers.
As a perfect example, I will mention a developer named DrPinkCake, the creator of the games Being a DIK. In the nine months it took to develop his last update, 5000 static renders and animations were created (according to the information provided via his Patreon). If you calculate it, it is approximately 550–560 images per month, and it must be taken into account that it is not only about creating the image but also clothes, light, environment, and similar things before you get to the result. In this time frame, he managed to do post-work (which I don't want to take into account since we don't deal with Photoshop here) and coding. And yes, by all accounts, he should be working alone.
Of course, it's definitely easier for him since he has over 15,000 Patreons, so he doesn't have to deal with the financial situation and problems of an ordinary person. But the fact remains that it is not unrealistic.
I don't say it's unrealistic but I say that I doubt it's done without the help of AI.
Blender has a lot of computer-enhanced features and most of the work is done by blender...
Don't think I didn't use all these tools. I know them. I even made a game and programmed a Delaunay triangular in C#.
That's why I highly doubt what you're saying.
Also, here you're talking about a full project.
And certainly once you have all your 3d models, textures, and so on at hand. You'll certainly make scenes faster.
But you have to start the project. It's not like you come to blender and within 10 mins, you get me the first image of your game.
I can tell you by experience that first you'll take much more time to select your model, refine your model, and so on until you get what you want.
The same goes for texture selection, materials, lighting, shaders, and so on...
It's even longer if you start programming your own shaders.
But after that, once you've everything, then you can render new images much faster cause you already have all tools and ressources at hand.
Also when you make images for a RenPy game, you can render a lot of images where you only do a little change in the scene and render it again. Or you just move the camera to another angle and you render. Which means that on the same scene... You can render more than one image without changing "clothes, light, environnement, and similar things". It's not like generating a new scene at each iteration.
So you have to put your figures into perspective... If you give me a full 3d model with a template scene. I can also render something in 10 mins.