diff --git a/main.cpp b/main.cpp
index 6e3651e..0ac5dec 100644
--- a/main.cpp
+++ b/main.cpp
@@ -850,6 +850,11 @@ int main() {
 	// Create a single binding with variable number of descriptors
 	u32 texture_count = (u32)wapp_array_count(textures);
 
+	// VK_DESCRIPTOR_BINDING_VARIABLE_DESCRIPTOR_COUNT_BIT specifies that this is a variable-sized
+	// descriptor binding whose size will be specified when a descriptor set is allocated using this
+	// layout. The value of descriptorCount is treated as an upper bound on the size of the binding.
+	// This must only be used for the last binding in the descriptor set layout (i.e. the binding with
+	// the largest value of binding).
 	VkDescriptorBindingFlags desc_variable_flag = VK_DESCRIPTOR_BINDING_VARIABLE_DESCRIPTOR_COUNT_BIT;
 
 	VkDescriptorSetLayoutBindingFlagsCreateInfo desc_binding_flags = {};