This entity lets you place special textures in your map, on top of solid brushes. Things like scorch marks, cracks, oil, lettering, etc. can be applied. The Decal Tool in Hammer is an easier way to apply them.
Name (targetname) - Property used to identify entities.
Pitch Yaw Roll (angles) - Sets the pitch (up / down), yaw (left / right) and roll (bank) respectively. The compass in WorldCraft / Hammer corresponds to Yaw. The settings are not always (or not all) used.
texture (texture) - This defines which image from decals.wad will be displayed by the entity.
Not in Deathmatch (2048)
Works only with decals.wad textures.
Works only on singleplayer mode.
Triggering it will cause it to appear. Triggering it again will not cause it to disappear.
angles has no function on this entity. Instead, the decal is oriented and scaled according to Rotation, Scale and Align of the face of the solid it is on.
Tip: you can form different symbols by superimposing decals or placing them close to each other. Changing the face properties of the solid the decals are on will change how they will be rendered as well.
Doesn't count on the texture memory usage of the map, but it is said that each count as individual sprites.
Can be placed at a maximum distance of 3 units from the face of a solid and will stick on any face within that range -- say you place it in the very corner, then it will be rendered both on the walls and floor or ceiling.
Doesn't work on special textures like AAATRIGGER, CLIP, SKY, etc.
Hammer Editor: managing this entity can be a bit buggy. Use Ctrl+M and hit Enter to update the texture and sizing.