Note: Unless you are using a severely outdated operating system or CPU, you most likely want to always download the x64 (64-bit) version of Ultimate Doom Builder.
The 64-bit version has less limitations on the total size of the project that you can load and edit, while the x86 (32-bit) version of Ultimate Doom Builder only exists for compatibility with older PCs.
If not sure, follow these instructions to find out whether your system is 64-bit: Which version of Windows operating system am I running?
The 64-bit version has less limitations on the total size of the project that you can load and edit, while the x86 (32-bit) version of Ultimate Doom Builder only exists for compatibility with older PCs.
If not sure, follow these instructions to find out whether your system is 64-bit: Which version of Windows operating system am I running?
All recent versions
Ultimate Doom Builder R4212
18 Jan 2025
Map Analysis Mode: fixed a crash when there are linedefs with action 0 in the map. Fixes #1158
Ultimate Doom Builder R4211
18 Jan 2025
Things Mode: fixed a crash when highlighting a thing when there's an unknown linedef action type in the map. Fixes #1157
Ultimate Doom Builder R4210
18 Jan 2025
Map Analysis Mode: missing texture error skipped by 181 slope type (#1143)
Ultimate Doom Builder R4209
18 Jan 2025
GZDoom Game Configuration: added lm_sunintensity to ZDRayInfo (#1148)
Ultimate Doom Builder R4208
18 Jan 2025
Map Analysis Mode: added texture error check for sky transfers (#1142)