Source Level Editor (SLE)

Source Level Editor (SLE) is a custom edited version of Hammer. It is not meant to be a radical overhaul. Rather, it iterates and adds polish to the basic workflow to make mapping experience smoother, more consistent, expanded, and in some areas: automated.

Development of SLE started in November 10, 2020 by Cvoxalury.

Features

Tool improvements:

• All Block Tool primities are previewed before creation, including preview of arches and toruses.
• 3-Point clipping is added, allowing for freeform clipping at any angle.
• Face Edit Tool supports growing selection by angle and texture skewing (a.k.a. shearing).
• Displacement Tool supports free dragging of vertices, 45° angle XY sculpting axis, fixed Face Normal axis.
• Vertex Edit Tool supports XYZ transform for vertices and collapsing edges with the Delete key.
• Material Browser includes Favourites materials list specified per-game.
• Sound Browser now supports parsing soundscapes for selecting them.
• Model Browser now displays attachments and can filter out Only Used models.

Render improvements:

• SLE can display both regular skybox and 3D Skybox.
• Material Proxies work in 3D View.
• Several visual entities have previews, such as beams and spotlights.
• Rendering of Tool Textures and Editor Objects is toggleable.

UI improvements:

• Hotkeys are now defined in an external, user-editable file and can be reassigned for every supported command.
• Customisable 2D and 3D colours (such as grid lines, the void, selected objects, instances) can be configured in the Options.
• Run Map Dialogue (non-Expert) has been expanded with common compile options.
• Numerous tool and config dialogues have been cleaned up and/or expanded.

Stability improvements:

• Multiple crash bugs, performance slowdowns and limits from the original Hammer have been dealt with.

Supported and Unsupported games

Fully supported games are:

• Half-Life 2 and its Episodes
• Half-Life 2: Deathmatch
• Portal
• Team Fortress 2
• Day of Defeat: Source
• Counter-Strike: Source
• Source SDK Base 2013 based games and mods

Unsupported games ( untested / very limited support / or lack of any support ) include:

• Games on older Source branches (sdk 2007 etc)
• Garry's Mod
• Alien Swarm
• Left 4 Dead 1 / 2
• Portal 2
• CS:GO and newer games.

External links

• Source Level Editor (SLE) Github