Would have been deemed a mod if I did not add a new game material, but will greatly improve the old ones? I mean,
many new reactions (mixes)?

????? ?? ???????? ????? ???? ? ?? ??????? ? ???? ????? ????????,?? ??????????? ?????? ??????? ? ???? ????? ??????? ????? ????? ???????(??????????)?

P.s.
else if ((r&0xFF)==PT_GUNP && 15>(rand()%1000))
part_change_type(r>>8,x+rx,y+ry,PT_DUST);
else if ((r&0xFF)==PT_DYST && 15>(rand()%1000))
part_change_type(r>>8,x+rx,y+ry,PT_YEST);
else if ((r&0xFF)==PT_YEST)
part_change_type(r>>8,x+rx,y+ry,PT_DYST);
else if ((r&0xFF)==PT_WATR && 15>(rand()%100))
part_change_type(r>>8,x+rx,y+ry,PT_DSTW);
else if ((r&0xFF)==PT_PLEX && 15>(rand()%1000))
part_change_type(r>>8,x+rx,y+ry,PT_GOO);
else if ((r&0xFF)==PT_NITR && 15>(rand()%1000))
part_change_type(r>>8,x+rx,y+ry,PT_DESL);
else if ((r&0xFF)==PT_PLNT && 5>(rand()%100))
create_part(r>>8, x+rx, y+ry, PT_WOOD);
else if ((r&0xFF)==PT_DESL && 15>(rand()%1000))
part_change_type(r>>8,x+rx,y+ry,PT_GAS);
else if ((r&0xFF)==PT_COAL && 5>(rand()%100))
create_part(r>>8, x+rx, y+ry, PT_WOOD);
else if ((r&0xFF)==PT_DUST && 5>(rand()%100))
create_part(r>>8, x+rx, y+ry, PT_FWRK);
else if ((r&0xFF)==PT_FWRK && 5>(rand()%100))
//create_part(r>>8, x+rx, y+ry, PT_DUST);
{
parts[r>>8].ctype=PT_DUST;
}
else if ((r&0xFF)==PT_ACID && 5>(rand()%100))
create_part(r>>8, x+rx, y+ry, PT_ISOZ);
/*if(parts[r>>8].type>1 && parts[r>>8].type!=PT_NEUT && parts[r>>8].type-1!=PT_NEUT && parts[r>>8].type-1!=PT_STKM &&
(ptypes[parts[r>>8].type-1].menusection==SC_LIQUID||
ptypes[parts[r>>8].type-1].menusection==SC_EXPLOSIVE||
ptypes[parts[r>>8].type-1].menusection==SC_GAS||
ptypes[parts[r>>8].type-1].menusection==SC_POWDERS) && 15>(rand()%1000))
parts[r>>8].type--;*/
}

Very-very little)).

p.p.s. But I write on Delphi and study the structure of the game will take time.

Would have been deemed a mod if I did not add a new game material, but will greatly improve the old ones? I mean,
many new reactions (mixes)?)

Blin, dolbannyiy translator.

I think as long as you add a reasonable amount on to the base game, it will be deemed a mod. As far as I know, there is no definition of what's a mod and what isn't. Really, as long as you've actually done something noticeable, it'll be counted as a mod.

M-m-m, ok.