BFG undobtly has the better renderer
Vanilla is ok but it still uses a load of deprecated opengl calls.
Megatextures where not used at all in Vanilla either so i guess they left it out completly. Also Vanillas megatexture code was probably one of id's first versions and it had some drawbacks. Newer the less it would have been nice for a modder for outdoor areas
but giving us rages updated version before rage actually became GPL and free to use was probably not in carmacks plans
Id like to make a game unfortunatly my skills in the mapping department are less than stellar (can hardly Draw a pencilman without breaking both the paper and the pencil lol) so i stick to coding
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The tools for BFG are out but just a warning the download is 35 gb
they also are not for the faint of Heart to use. You can grab them on steam. Look for Rage Toolkit or something like that.
Productivity is a state of mind.