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Blog125.1K views623 votes0 replies2,388 following

Sequencing Map Events with logic_relay in Source Engine Hammer

Wire one player action to multiple delayed events in Hammer using logic_relay, then verify the chain on a dedicated server.

logic-relay hammer-editor entity-ioTasadduq Burneyowner34.8K rep · 13 Sept 2025, 19:45 UTC

Blog23.2K views713 votes1 reply1 comment1,738 following

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Source 1 Entity I/O: Wire Map Logic Without Code

Wire Source 1 map entities with named outputs and inputs, then test live with ent_fire.

hammer source-1 entity-ioTasadduq Burneyowner34.8K rep · 17 Aug 2025, 18:47 UTC

Blog127.1K views1,399 votes1 reply1 comment3,686 following

How Source Engine Hides Latency: Prediction and Lag Compensation Under the Hood

Source Engine hides latency by running identical movement code on client and server. Learn how lag compensation rewinds hitboxes for hitscan and how the 100ms default lerp creates a fixed peeker's advantage for map design.

networking

sourceengine lag-compensationTasadduq Burneyowner34.8K rep · 05 Mar 2026, 19:56 UTC

Blog112.8K views1,645 votes1 reply1 comment3,333 following

Wiring Source Engine Maps in Hammer Without Server Code

Wire Source Engine entities in Hammer so a button opens a door and plays a sound, without server code.

source-1 entity-io

sourceengineTasadduq Burneyowner34.8K rep · 04 Jun 2026, 01:35 UTC

Blog53.9K views918 votes1 reply1 comment3,036 following

Source Engine NavMesh: Why NPCs Stop Getting Stuck on Stairs

Source Engine NPCs get stuck because legacy nodes don’t cover continuous walkable space. A built-in NavMesh of convex polygons stored in a .nav file gives reliable A* pathfinding, but it must be generated and kept in sync with map geometry.

navmesh hammer-editor

sourceengineTasadduq Burneyowner34.8K rep · 04 Jul 2026, 17:49 UTC

Guide143.2K views1,736 votes0 replies3,163 following

Source Engine Entity Replication: Choosing Between PVS and FL_EDICT_ALWAYS

In Source SDK 2013, entity replication is driven by Send/Recv tables and the engine's PVS check. Learn when to trust the default and when to force FL_EDICT_ALWAYS.

sourceengine send-table source-engineTasadduq Burneyowner34.8K rep · 19 Aug 2025, 23:48 UTC

Blog127K views2,185 votes0 replies1,401 following

Managing the Void: Understanding BSP and PVS in Source Engine Geometry

Learn how the Source Engine uses BSP and PVS to manage visibility and collision, and why 'leaks' in your brush geometry can break your map compilation.

bsp-compilation

sourceengine pvs-visibilityTasadduq Burneyowner34.8K rep · 10 Jul 2025, 18:12 UTC

Blog33.9K views4,491 votes0 replies2,421 following

Reducing VVIS Compile Times with func_detail in Source Engine

Learn how to slash VVIS compile times and reduce runtime overdraw in the Source Engine by strategically converting decorative world brushes to func_detail.

hammer-editor vvis

sourceengineTasadduq Burneyowner34.8K rep · 29 Sept 2026, 13:14 UTC

Blog86K views3,856 votes0 replies1,648 following

Tuning Source Engine LOD: From QC Blocks to Real‑Time Performance

Learn how to set up and verify model level‑of‑detail (LOD) in the Source Engine, understand its impact on frame rates, and avoid visual popping. A step‑by‑step guide with a QC example, trade‑offs, and practical checks for the game developer.

level-of-detail

sourceengine performanceTasadduq Burneyowner34.8K rep · 14 May 2026, 10:34 UTC