diff --git a/specs/udmf_zdoom.txt b/specs/udmf_zdoom.txt
index 66d819333..ff0f50e4a 100644
--- a/specs/udmf_zdoom.txt
+++ b/specs/udmf_zdoom.txt
@@ -425,17 +425,19 @@ Note: All <bool> fields default to false unless mentioned otherwise.
       scale = <float>;          // Vertical and horizontal scaling on thing. Default = 0 (ignored).
       floatbobphase = <int>;    // Sets the thing's floatbobphase. Valid phase values are 0-63. Default = -1 (use actor class default).
 
+      // ZDRayInfo fields [VKDOOM]
       lm_sampledist = <int>;        // lightmap sample distance for the entire map. Defines the map units each lightmap texel covers. Must be in powers of two. Default = 8 [VKDOOM]
       lm_suncolor = <int>;          // lightmap sun color. Default is white (0xFFFFFF). [VKDOOM]
       lm_sunintensity = <float>;    // lightmap sun intensity multiplier. Default = 1.0 [VKDOOM]
+      lm_ao = <bool>;               // enables ambient occlusion baking with VKTool. [VKDOOM]
+      lm_bounce = <bool>;           // enables bounce light baking with VKTool. [VKDOOM]
 
-      light_softshadowradius = <float>;   // lightmap light and raytraced dynamic light soft shadow amount. Higher values produce softer shadows. Default = 5.0 [VKDOOM]
-      
-      light_strength = <float>;   // Light strenght for Inverse-square falloff lights. Default = 0.0 (auto) [VKDOOM]
-      
-      light_noshadowmap = <bool>; // Disable shadows for light [VKDOOM]
-      light_dontlightactors = <bool>; // Don't light actors [VKDOOM]
-      light_dontlightmap = <bool>; // Don't light map geometry [VKDOOM]
+      // Dynamic and lightmap light fields [VKDOOM]
+      light_softshadowradius = <float>;    // lightmap light and raytraced dynamic light soft shadow amount. Higher values produce softer shadows. Default = 5.0 [VKDOOM]
+      light_strength = <float>;            // Light strength for Inverse-square falloff lights. Default = 0.0 (auto) [VKDOOM]
+      light_noshadowmap = <bool>;          // Disable shadows for light [VKDOOM]
+      light_dontlightactors = <bool>;      // Don't light actors [VKDOOM]
+      light_dontlightmap = <bool>;         // Don't light map geometry [VKDOOM]
 
       friendlyseeblocks = <int>;    // How far (in block units) a friendly monster can see other monsters. Default 10