Docs for ancilliary tools

doc/Cleanup.md

@@ -1,3 +1,20 @@
 # Cleanup tool
 
-TODO
+Mostly this script cleans up Hot Reload DLLs that often get left over. It used
+to also call `git lfs prune` but has stopped doing that for now because 
+of a previous bug in Git LFS which would delete stashed LFS files.
+
+I don't use this script very much any more because I'm using Live Coding now.
+The script also cleans up Live Coding patches but there's fewer of those.
+
+```
+  ue4-cleanup.ps1 [[-src:]sourcefolder] [Options]
+
+  -src         : Source folder (current folder if omitted)
+               : (should be root of project)
+  -nocloseeditor : Don't close UE4 editor (this will prevent DLL cleanup)
+  -lfsprune    : Call 'git lfs prune' to delete old LFS files as well
+  -dryrun      : Don't perform any actual actions, just report on what you would do
+  -help        : Print this help
+```
+

doc/GetLatest.md

@@ -1,3 +1,24 @@
 # Getting Latest for Artists
 
-TODO
+We've found it useful to provide a simple script which can be run on artists'
+machines to get the latest from Git, and make sure all the C++ components are
+built. 
+
+While the UE editor can sometimes do this successfully on startup as well,
+it's just nicer to do it as part of the update process - the artist can then 
+just double-click a shortcut on their desktop and let it run while getting
+coffee or something.
+
+The script also automatically closes the UE editor if it's open on the same
+project to make sure the build is successful.
+
+```
+  ue4-get-latest.ps1 [[-src:]sourcefolder] [Options]
+
+  -src         : Source folder (current folder if omitted)
+               : (should be root of project)
+  -nocloseeditor : Don't close UE4 editor (this will prevent DLL cleanup)
+  -dryrun      : Don't perform any actual actions, just report on what you would do
+  -help        : Print this help
+```
+

doc/RebuildLightmaps.md

@@ -1,3 +1,31 @@
 # Rebuilding Lightmaps
 
-TODO
+This script is a more convenient alternative to calling `RunUAT RebuildLightmaps`, which 
+has the downside of being unnecessarily dependent on Perforce.
+
+This script is compatible with Git (if you're using it), and specifically copes
+with Git LFS file locking. When building lighting the `.umap` needs to be locked 
+for writing, this script will do that if necessary. The RunUAT version fails if
+you don't have Perforce even if you've already locked the file in LFS! Very silly.
+
+This script uses the [packaging configuration file](./Package.md) and can 
+automatically determine which maps to rebuild if you want, or you can 
+explicitly list them as arguments: 
+
+```
+  ue4-rebuild-lightmaps.ps1 [-src:sourcefolder] [-quality:(preview|medium|high|production)]  [-maps Map1,Map2,Map3] [-dryrun]
+
+  -src          : Source folder (current folder if omitted)
+  -quality      : Lightmap quality, preview/medium/high/production
+                :   (Default: production)
+  -maps         : List of maps to rebuild. If omitted, will derive which ones to
+                  rebuild based on cooked maps in packageconfig.json
+  -dryrun       : Don't perform any actual actions, just report on what you would do
+  -help         : Print this help
+
+Environment Variables:
+  UE4INSTALL   : Use a specific UE4 install.
+               : Default is to find one based on project version, under UE4ROOT
+  UE4ROOT      : Parent folder of all binary UE4 installs (detects version).
+               : Default C:\Program Files\Epic Games
+```