diff --git a/specs/udmf_zdoom.txt b/specs/udmf_zdoom.txt
index ff0f50e4a..32f9b7ffb 100644
--- a/specs/udmf_zdoom.txt
+++ b/specs/udmf_zdoom.txt
@@ -431,6 +431,7 @@ Note: All <bool> fields default to false unless mentioned otherwise.
       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]
+      lm_dynamic = <bool>;          // enables dynamic lightmap updates for the whole map (without having to do it per sector). Use with care as this can drag down performance. Default = false [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]
diff --git a/src/maploader/udmf.cpp b/src/maploader/udmf.cpp
index 1fd9869c3..7a2e20b35 100644
--- a/src/maploader/udmf.cpp
+++ b/src/maploader/udmf.cpp
@@ -792,8 +792,17 @@ public:
 				break;
 
 			case NAME_light_softshadowradius:
+			case NAME_light_linearity:
+			case NAME_light_noshadowmap:
+			case NAME_light_dontlightactors:
+			case NAME_light_dontlightmap:
+			case NAME_light_shadowminquality:
 			case NAME_lm_suncolor:
+			case NAME_lm_sunintensity:
 			case NAME_lm_sampledist:
+			case NAME_lm_bounce:
+			case NAME_lm_ao:
+			case NAME_lm_dynamic:
 				CHECK_N(Zd | Zdt)
 					break;
 
@@ -2205,6 +2214,7 @@ public:
 
 				case NAME_lm_sampledist_floor:
 				case NAME_lm_sampledist_ceiling:
+				case NAME_lm_dynamic:
 					CHECK_N(Zd | Zdt)
 					break;
 
diff --git a/src/namedef_custom.h b/src/namedef_custom.h
index cefcd6787..bfa97008c 100644
--- a/src/namedef_custom.h
+++ b/src/namedef_custom.h
@@ -871,9 +871,17 @@ xx(lm_sampledist_floor)
 xx(lm_sampledist_ceiling)
 xx(lm_dynamic)
 xx(lm_suncolor)
+xx(lm_sunintensity)
+xx(lm_bounce)
+xx(lm_ao)
 
 // Light keywords
 xx(light_softshadowradius)
+xx(light_linearity)
+xx(light_noshadowmap)
+xx(light_dontlightactors)
+xx(light_dontlightmap)
+xx(light_shadowminquality)
 
 xx(skew_bottom_type)
 xx(skew_middle_type)