Is the master flag even present/checked, or do they always get treated as non-master plugins?.

Are they treated like normal plugins, able to be active anywhere that's suitable for their master flag value, or are they treated like DLC and implicitly loaded before all other non-official plugins?.

How are ESL files placed in the load order?.

their merging behaviour), so that LOOT can determine FormID overlap between ESL files and other plugins.

The format of FormIDs in ESL 'on disk' and the format they take once loaded in the game (i.e.

Does the game differentiate ESL from other plugin types based on file extension or an internal flag or both?.

The file format of ESL files vs ESM/ESP files, so I know how to parse their headers and record FormIDs.

What I wonder is if all ESL share the same most significant byte for load order (which would limit to 256 ESL at once) of if they can use more than one. Also CC content has been added to the list of file automatically loaded when the game start so probably they will load before any mod. The runtime load order index was increased from 1 byte to two which changed the internal format of TESFile (ModInfo). quoted some info from hlp on the LOOT thread, reposting it here:Īs far as I can see, ESL use 2 bytes for load order and 6 for formID, so they don't need to be renumbered.

I've now got a copy of Fallout 4 thanks to Nebulous112's generosity, so I'll start working on this this weekend. esl files in the wild, or any docs detailing their structure, that would be useful, as I don't own Fallout 4.Īlso, that wiki page mentions. I'll need to update libespm to support reading the new file format, libloadorder to recognise them and not include them in active plugins counts, and LOOT to recognise them. I guess I could work that out from the file format. The above suggests you can have an unlimited number of. NOTE: Compacting form ids does change formids in the plugin, so only do this before converting to. It is good practice to run Compact Active File Form IDs to optimize your formids within the 4,000 form budget. esp file, and under File, select Convert Active File to Light Master. To convert a normal plugin (.esp) to a light (.esl) plugin, load your. esp it was converted from, so saved games will not be compatible between them. esl files are treated as unique files from the. esl files have a budget of no more than 4,000 forms. esl files bypass the 8-bit plugin ID limit (255).

Active development should be done in an normal (.esp) plugin.

They behave like a normal plugin, except for the following: Light plugin (.esl) file are a new optimized file format, introduced in the 1.10 Update.

Fallout 4 vanilla extensions