This tutorial will show you how to make all models in your map fullbright. This technique helps make players and item pickups more visible to other players in your map, regardless of the map's light level.

Please note that you will need to run through the below 6 steps each time you wish to playtest your map.(with proper lighting anyway)

Step 1. Edit->Level Properties
Step 2. Set "Ambient Light" to whatever ambient light level you wish to use in your map.
Step 3. Build & calculate lights and lightmaps.
Step 4. Edit->Level Properties
Step 5. Set "Ambient Light" to "255, 255, 255" (Fully white)
Step 6. Save map, create packfile.