My question is, where can I get the Targa files? I understand, that I only can use DDS with FPS C. But I want to use AGK2 for some other things like AI programming, Physics, Sounds, WebGL etc. To have more controll about what happend. I also want sequential loading. So that you can start your game after some seconds, only the first room is loaded, and while you are working around, the other rooms will be loaded in the background. Like Texture Streaming.
AKG2 only supports PNG and JPEG. So I can't use the DDS files directly. I convert them with XnConvert to PNG in the first step. But to fact that DDS is already lossy compressed this will result in bigger PNG filesize, because I will also store artefacts from the DDS. So my idea and hope is, that the Targa file will have smooth color transitions, less noise and would result in smaller and nicer looking PNGs while encoding them with XnConvert.
That my conversion path could be:
Targa (lossless) ==> PNG (lossless) ==> scanning for transparence, if no trancparence: ==> JPEG (lossy)
I also thinking of dimension reducing like you said, not smaller than 512 px by 512 px for most textures. Don't need 2048 x 2048 or larger for most of the objects. And some smaller objects will look fine and sharp with 256 x 256. I want do automate most of the process. But I have not the Targas (anymore). Or in other words, if I want to make it available for others, because it is some work, and maybe someone finds it neat, I could provide it, BUT, only if the textures are also FREE. Or I have to redraw most of the things.
The model packs from the free source only contain the DDS files. That is my "problem". I don't know, if I could improve the quality if I would using Targa Originals instead of DDS, but I want to try it. But there the FPSC Classic guys came in. I need some help, to get the Targa files. Or I will stuck with the Free provided DDS files.
Will the FPSC Classic comunity get something out of it? I don't realy know, but this project I had in mind could provide a set of good quality textures with a small amount of reqired disk space. For the FPSC Classic community I could convert the Targas also in FPSC Classic compatible better looking DXT compressed DDS files. With newer tools some quality could be improved.
Mostly this is for the idea, to convert FPSC Classic "games", levels to AGK2. I don't know, if anybody cares. But I wanted to try

And I saw, that textures have most space for improvement. Also to improve loading times from levels. Because JPEG and or PNG decompression is very slow.
AGK2 I think will not have support for DXT DDS compression, because this is mostly not supported in OpenGL ES 2.1 So thats why I am trying to work around.
So maybe you know a source to get the Targas for the provided FPSC Classic models from the
https://github.com/LeeBamberTGC/FPS-Creator-Classic