well i didn’t find any usefull engines the most are or to big or do not have a source code …
but isn’t there a small source code that has the right way of loading textures, using different filters in order, loading the right way from a textfile, blends and maybe use light??
nehe shows you how to do all these things
“loading textures, using different filters in order, loading the right way from a textfile, blends and maybe use light??”
Lessons 10 and 23 show a small game, the others will show you special effects. You should have a look at the opengl redbook or superbible to look at the proper usage of the fuctions used in the tutorials (links are at nehe’s site). Other parts of an engine (collision detection, BSPs/octrees, sound, AI) you will have to use other tutorials. Everything eles is up to you, you will need to think of the best way to structure and code your program.