I don't think I'll continue to work on this project. you are free to do whatever you want.
I hope this can be usefull

Only polymer render, is Standalone and works without GRP.
this project is totaly Bugged and Unfinished. Ask me if you want the source files.
Download
Keys
------------------------------
WASDF move.
Space jump/fly
Left Ctrl crouch
Left-right mouse delete/add block
Middle mouse select/deselect block
Q Quick tool menu
Left Shift Alternative tool stuffs (you can change blocks view distance on fog button for example)
E Inventory
Tab copy block to de clipboard
Changes mades in Eduke32 :
------------------------------
- Deleted ALL hard coded actors and duke nukem related things...
- Deleted polymost end classic render code
- Enabled file compression / decompression for writearraytofile / readarrayfromfile command
This allows to work with smaller files and read/write much faster in game.
- Better support for skybox on polymer
- 90° horiz view
- added new spriteext member, actor[].xscale and actor[].yscale, this scaling on game model's texture
- deleted lots of inused commands...
- Tons of other stuff I don't remember to improve fps rate etc.... I made a mess.

Features of X-Block
------------------------------
- (16 * 4'194'304) possible blocks in game 128*128*256 block per chunk ! (this can be unlimited because is possible to write and read map array data from external file and overwriting/saving actual array in memory... but is not done.. )
- world occlusion culling
- dynamic world generation
- add/remove/copy/past and move blocs (some other function are broken, or unfinished :/)
- save, load map using external array file (not build map format)
- coded face shading
- complete day/night cycle
- moon cycle and real starfield cycle
- dynamic clouds with fog and wind control
- real on game time control
- other stuff I don't remember... ?