[Renderer] Fixed crash when having no meshes in scene.

Author: ChunkTreasure1

Engine/Source/JobSystemModule/Public/JobSystem/Job.h

@@ -50,7 +50,7 @@ namespace Volt
 			{
 				NotifyCounterReady();
 
-				m_isCompleted.store(1, std::memory_order::relaxed);
+				m_isCompleted.store(1, std::memory_order::release);
 				m_isCompleted.notify_all();
 			}
 			return prevCount;
@@ -90,7 +90,7 @@ namespace Volt
 
 		VT_INLINE void WaitForCounterLocking()
 		{
-			m_isCompleted.wait(0, std::memory_order::relaxed);
+			m_isCompleted.wait(0, std::memory_order::acquire);
 		}
 
 		// Needs to be in a cpp file as it interacts with 

Engine/Source/Volt-Renderer/Private/Volt-Renderer/MeshPassProcessorsBindless/MeshPassProcessorBindless.cpp

@@ -48,6 +48,10 @@ namespace Volt
 	{
 		VT_PROFILE_FUNCTION();
 
+		// Reset the resources tied to the lifetime of the RenderGraph.
+		m_perDrawCommandInstancesBuffer = nullptr;
+		m_rhiDrawCommandsCopy = nullptr;
+
 		if (m_meshDrawCommands.empty())
 		{
 			return;
@@ -144,6 +148,12 @@ namespace Volt
 	{
 		VT_PROFILE_FUNCTION();
 
+		// Processor has no commands.
+		if (m_meshDrawCommands.empty())
+		{
+			return;
+		}
+
 		// Use RHIDrawCommandSceneInstanceOffsets to pass in as per instance value, which contains the start offset of the scene instances.
 		IntRef<RHI::CommandBuffer> mainCommandBuffer = renderContext.GetRHICommandBuffer();
 		IntRef<RHI::Buffer> perDrawCommandInstancesBuffer = m_perDrawCommandInstancesBuffer->GetRHIResource()->GetRHIBuffer();