Snail Engine

DirectX 11 C++ Game Engine.

Created by :

• Narvin Chana
• Alexandre Lemarbre-Barrett
• Paul Richard
• Hugo Pierron

Scenes are created via .json files like in Example.json. Some default scenes with meshes, textures and other assets are available here.

Features

• Blinn-Phong deferred lighting
• Screen-Space Deferred Decals
• Directional Light (CSM with PCF)
• Spot and Point Lights
• Normal Mapping
• Volumetric Lighting inspired by Benjamin Glatzel's work
• Procedural GPU-Instanced Grass inspired by Sucker Punch's work on Ghost of Tsushima
• Terrain Loading and Chunking
• Multithreaded .obj parsing and asset management
• SSAO
• FXAA
• PhysX 5.3 Integration
• ImGui Editor (Scene JSON loading and serialization)

Screenshots

The following screenshots are all taken in-engine.

Screen-Space Deferred Decals

Volumetric Lighting

Here is how it is achieved in real time with potentially many lights :

1. Initial accumulation Pass with interleaving at half-resolution

Accumulation Buffer (and zoom)

2. Bilateral Gaussian Blur Pass to reduce noise (and conserve shape)

Before Blur Pass	After Blur Pass

3. Nearest-Depth Upsample Pass

Procedural Grass (GPU Instanced)

Instance Data Generated in Compute Shader :

Texture Masking :

SSAO

FXAA