This file defines what items are generated when a creature uses an item of filename RNDTRE0#.ITM, where # is the row number of RNDTREAS.2DA to use. RNDTRE0#.ITM is replaced by the generated item. Therefore, this works like a random treasure table.

The first column of RNDTREAS.2DA specifies the name of the row, currently a simple generic name. The rest of the 19 columns have headers 2, 3, 4, 5, ..., 18, 19, 20. The column used is specified by a roll of a D20, with rolls of 1 replacing RNDTRE0#.ITM with no item. Note that this is different from RNDSCROL.2DA, which has an extra column labelled 1, but similar to RNDMAGIC.2DA. Only 20 columns in total are supported, else the 2da file will fail to work entirely. When this happens, all RNDTRE0#.ITMs are replaced by erroneous invisible items that cannot be removed.

The PSTEE version of RNDTREAS.2DA is shown below. In essence, RNDTREAS.2DA works exactly the same as RNDSCROL.2DA, so see RNDSCROL.2DA for an example of how RNDTREAS.2DA works. However, RNDTREAS.2DA can be directly referenced by RNDSCROL.2DA without actually having RNDTRE0#.ITM as a resource. For example, an entry in RNDSCROL.2DA that reads RNDTRE05, and a D20 roll of 6 will replace RNDTRE0#.ITM with AEGIS.

In PSTEE we have:
2DA V1.0
    1   2           3       4           5       6           7           8           9           10          11          12          13          14          15          16          17          18          19          20
1   *   10*10       copear  broring     brobra  rustdag     clotchrm    dratchrm    10*10       broring     10*10       10*10       copear      broring     brobra      rustdag     clotchrm    dratchrm    10*10       brobra
2   *   40*50       silear  silring     silbra  stiletto    hammer      ax          bloochrm    cratchrm    RNDSCR01    40*50       stiletto    silear      silring     silbra      40*50       ax          silring     cratchrm
3   *   50*100      golear  golring     golbra  axqual      qstlo       gsknife     gsdagger    RNDSCR02    hearchrm    knotchrm    bonechrm    50*100      golring     RNDSCR02    gsknife     50*100      bonechrm    RNDSCR02
4   *   hearchrm    20*500  20*500      20*500  hearchrm    20*500      20*500      20*500      20*500      20*500      hearchrm    20*500      20*500      20*500      hearchrm    20*500      20*500      20*500      20*500
5   *   heaven      umei    zero        bell    aegis       50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000     50*1000

RNDTREAS.2DA is supposed to support 9 functional rows of random treasure (from rndtre01.itm up to rndtre09.itm).
However, because of lax or missing range checks it is possible to extend the list quite a bit beyond the nine entries. The engine seems to use the ASCII code of the last filename character. After 9 there would be :, ;, <, =, >, ?, @, followed by A to Z. While characters like : or ? are difficult to use because of their special meaning on filesystems, you can still use A to Z, which results in additional 26 random treasures (from rndtre0a.itm up to rndtre0z.itm). The entries between 9 and A can simply be filled with empty dummy entries.

If RNDTRE0#.ITM references a non-existant or an ignored row number (or if #=0 under any circumstances), then RNDTRE0#.ITM is replaced by an erroneous invisible item that cannot be removed. Note that the replacing item is NOT RNDTRE0#.ITM itself, in this case. This blank item can likely be altered by setting the default 2da entry to a valid item.

Items that can be referenced:
Items that cannot be referenced: Since RNDTREAS.2DA can reference RNDMAGIC.2DA and RNDSCROL.2DA, and RNDWEP.2DA but not RNDEQUIP.2DA, this 2da file is the second to the top of the random treasure table hierarchy.