Tools
The workshop behind it.
Addons and apps that make the assets and the terrain. P3D Studio has a full manual.
P3D Studio
MLOD import, export, LODs, proxies, Memory loot.
Open the P3D manual
Collider
AABB, V-HACD hulls, DayZ geometry checks.
TrimSheet Toolkit
Build trim sheets, assign faces, live UVs.
Texture Tools
PBR → PAA + RVMat, no Blender.
Terrain Studio
Terrain workflow as a Windows app.