AlphaToCoverageTransparency

Cutout Transparency with Alpha to Coverage

Code Name: AlphaToCoverageTransparency

Description

In this example, three planes containing metal chain textures are placed on the scene and order-independent rendering is performed. The Alpha-To-Coverage (A2C) technique is used to ensure that the completely transparent parts of this metal chain are discarded correctly.

Output

Controls

Input	Action
W/A/S/D	Move the camera
Mouse	Look around with the camera
Esc	Close the window

Application Parameters

Settings

Parameter / Key	Type	Usage in Code	Description	Default Value
AppSettings.ClearColor	VkClearColorValue	AppSettings::ClearColor	Background color of the screen
AppSettings.MouseSensitivity	float	AppSettings::MouseSensitivity	Mouse sensitivity value
AppSettings.CameraSpeed	float	AppSettings::CameraSpeed	Speed of the camera

Learning Objectives

• Implementing order-independent cutout transparency with Alpha-To-Coverage (A2C) technique in Vulkan
• Using multisampling for cutout transparency

Shader Status

Shader Type	Status	Notes
GLSL	✅
HLSL	✅
Slang	❌	Will be implemented.

Theoretical Background

None

Extensions Used

Instance

Window system-dependent extensions:

• VK_KHR_surface
• VK_KHR_win32_surface (Windows)

Device

• VK_KHR_swapchain