DOOM Retro v2.5.4 is now available. It may be downloaded here, and its release notes are as follows:

• Optimizations have been made to further improve the overall performance and stability of DOOM Retro.
• The behavior of lost souls has been restored to better resemble Vanilla DOOM.
• Wiping when transitioning between screens can now be toggled on or off using the new wipe CVAR.
• Weapon recoil is now disabled when vanilla mode is enabled.
• A bug has been fixed whereby monsters could use stairs in some instances when they shouldn’t have been able to.
• Chaingunners, arachnotrons and spider masterminds now light up more in time with their firing animations.
• A value of off can now be used for the facebackcolor CVAR and is the same as using the default value of 5.
• A bug has been fixed whereby the sky would be slightly darker than normal when the player has the light amplification visor power-up.
• When pressing the PRINTSCREEN key while the am_external CVAR is on, a screenshot of both screens will now be taken rather than two screenshots of the same screen.
• The vid_capfps, vid_scalefilter and vid_vsync CVARs will now affect the external automap when the am_external CVAR is on.
• Obituaries in the console now correctly reflect when the player or a monster is telefragged.
• Pressing CTRL + ↑/↓ can now be used as well as PGUP/PGDN to scroll the output in the console up and down.
• The r_gamma CVAR can now correctly be set to 2.0 in the console and at startup.
• When the vid_capfps CVAR is a value other than 35, rockets and plasma rifle and BFG-9000 projectiles are now slightly further away from the player when fired.
• Further improvements have been made to lowering the player’s view in liquid sectors when the r_liquid_lowerview CVAR is on.
• Reducing the health CVAR will now work correctly when playing the I’m too young to die skill level.
• If no IWAD is specified, DOOM Retro will now also check for an installation of DOOM 3: BFG Edition purchased through GOG.com.