diff --git a/src/common/rendering/v_video.h b/src/common/rendering/v_video.h
index 18234ea92..75ec8f0d6 100644
--- a/src/common/rendering/v_video.h
+++ b/src/common/rendering/v_video.h
@@ -220,7 +220,8 @@ public:
 	virtual int GetClientHeight() = 0;
 	virtual void BlurScene(float amount) {}
 
-	virtual void InitLightmap(int LMTextureSize, int LMTextureCount, TArray<uint16_t>& LMTextureData, hwrenderer::LevelMesh& mesh) {}
+	virtual void GenerateLightmap(TArray<uint16_t>& LMTextureData, int LMTextureSize, hwrenderer::LevelMesh& mesh) {}
+	virtual void InitLightmap(int LMTextureSize, int LMTextureCount, TArray<uint16_t>& LMTextureData) {}
 
     // Interface to hardware rendering resources
 	virtual IBuffer* CreateVertexBuffer(int numBindingPoints, int numAttributes, size_t stride, const FVertexBufferAttribute* attrs) { return nullptr; }
diff --git a/src/common/rendering/vulkan/vk_renderdevice.cpp b/src/common/rendering/vulkan/vk_renderdevice.cpp
index 660473266..351236da5 100644
--- a/src/common/rendering/vulkan/vk_renderdevice.cpp
+++ b/src/common/rendering/vulkan/vk_renderdevice.cpp
@@ -475,9 +475,9 @@ void VulkanRenderDevice::BeginFrame()
 	mDescriptorSetManager->BeginFrame();
 }
 
-void VulkanRenderDevice::InitLightmap(int LMTextureSize, int LMTextureCount, TArray<uint16_t>& LMTextureData, hwrenderer::LevelMesh& mesh)
+void VulkanRenderDevice::GenerateLightmap(TArray<uint16_t>& LMTextureData, int LMTextureSize, hwrenderer::LevelMesh& mesh)
 {
-	if(false && mesh.surfaces.size() > 0)
+	if (false && mesh.surfaces.size() > 0)
 	{
 		Printf("Running VkLightmap.\n");
 
@@ -519,7 +519,10 @@ void VulkanRenderDevice::InitLightmap(int LMTextureSize, int LMTextureCount, TAr
 			}
 		}
 	}
+}
 
+void VulkanRenderDevice::InitLightmap(int LMTextureSize, int LMTextureCount, TArray<uint16_t>& LMTextureData)
+{
 	if (LMTextureData.Size() > 0)
 	{
 		GetTextureManager()->SetLightmap(LMTextureSize, LMTextureCount, LMTextureData);
diff --git a/src/common/rendering/vulkan/vk_renderdevice.h b/src/common/rendering/vulkan/vk_renderdevice.h
index d147e3ab6..a78f2bc5f 100644
--- a/src/common/rendering/vulkan/vk_renderdevice.h
+++ b/src/common/rendering/vulkan/vk_renderdevice.h
@@ -56,7 +56,8 @@ public:
 	void SetTextureFilterMode() override;
 	void StartPrecaching() override;
 	void BeginFrame() override;
-	void InitLightmap(int LMTextureSize, int LMTextureCount, TArray<uint16_t>& LMTextureData, hwrenderer::LevelMesh& mesh) override;
+	void GenerateLightmap(TArray<uint16_t>& LMTextureData, int LMTextureSize, hwrenderer::LevelMesh& mesh) override;
+	void InitLightmap(int LMTextureSize, int LMTextureCount, TArray<uint16_t>& LMTextureData) override;
 	void BlurScene(float amount) override;
 	void PostProcessScene(bool swscene, int fixedcm, float flash, const std::function<void()> &afterBloomDrawEndScene2D) override;
 	void AmbientOccludeScene(float m5) override;
diff --git a/src/maploader/maploader.cpp b/src/maploader/maploader.cpp
index bc19e56a4..9cdb214af 100644
--- a/src/maploader/maploader.cpp
+++ b/src/maploader/maploader.cpp
@@ -3219,7 +3219,9 @@ void MapLoader::LoadLevel(MapData *map, const char *lumpname, int position)
 	Level->levelMesh = new DoomLevelMesh(*Level);
 	InitLightmap(map);
 
-	screen->InitLightmap(Level->LMTextureSize, Level->LMTextureCount, Level->LMTextureData, *Level->levelMesh);
+	screen->GenerateLightmap(Level->LMTextureData, Level->LMTextureSize, *Level->levelMesh);
+
+	screen->InitLightmap(Level->LMTextureSize, Level->LMTextureCount, Level->LMTextureData);
 
 	for (int i = 0; i < MAXPLAYERS; ++i)
 	{