MipmappedShadowMaps

Mipmapped Variance Shadow Maps

Code Name: MipmappedShadowMaps

Description

In this example, the mipmaps of the generated variance shadow map are created, and the shadow map LOD selection is made according to the camera's distance from the fragment. Thus, shadow mapping is done with a small shadow map size for long distances, and simple soft shadows are provided through trilinear filtering.

Output

Controls

Input	Action
W/A/S/D	Move the camera
Mouse	Look around with the camera
Esc	Close the window
0	Disable shadow map LOD
1	Enable shadow map LOD

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

• Creating mipmapped variance shadow maps
• Apply trilinear filtering to the mipmapped shadow map to achieve soft shadows by distances to the camera

Shader Status

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