DOOM Retro v2.6.3 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 following changes have been made to the boss in MAP30: Icon Of Sin at the end of DOOM II: Hell On Earth:
  • Its projectiles will now move downwards.
  • The explosions when it is destroyed are now translucent if the r_translucency CVAR is on.
• The screen will now quickly fade to black when quitting DOOM Retro.
• Minor changes have been made to text that is output to the console.
• Further improvements have been made to the console’s autocomplete feature.
• The keycards and skull keys displayed in the alternate widescreen HUD now use the most dominant colors of those picked up by the player.
• A bug has been fixed whereby the screen would continue to shake after the player had died in some rare instances if the r_shake_damage CVAR was on.
• Vertical autoaiming as the player fires their weapon while using mouselook can now be toggled on and off using the new autoaim CVAR. This CVAR is on by default.
• The player is now given a berserk power-up when entering the IDFA or IDKFA cheats so they can then still equip their fists.
• The following changes have been made when freeze mode is on:
  • The bob of the player and the player’s weapon are disabled.
  • The give CCMD will now work correctly.
  • Any power-ups the player has will no longer time out.
  • The player’s health will no longer regenerate if the regenhealth CCMD has been used.
• The screen will now be updated immediately when entering the IDBEHOLDL or IDBEHOLDV cheats in the console.
• Areas outside of the map (accessible when either freeze mode or no clipping mode are on) are now white rather than black when the player has an invulnerability power-up.
• The -config command-line parameter will no longer be ignored when saving the configuration file.
• The -shotdir command-line parameter can now be used to specify the folder that screenshots will be saved in when the PRINTSCREEN key is pressed.
• Objects will no longer be lit incorrectly in some rare instances.
• The shadows cast by monsters will now be displayed correctly in areas with a custom colormap.
• The shadows cast by spectres will now be displayed correctly when the r_shadows_translucency CVAR is off.
• Using the nomonsters CCMD will now instantly remove all monsters in the current map.
• The brightmaps for several wall textures are now fixed.
• A bug present in Vanilla DOOM has been fixed whereby Mancubi projectiles would sometimes pass through walls.