IGR202 Course Project : Real-time volumetric cloud rendering

By Telo PHILIPPE
This is my project for my IGR course in Telecom Paris. My goal is to render real time volumetric clouds, using volume raymarching in a deferred pipeline.
I re-used some boilerplate code from the first practical project of this class (Interactive solar system), and adapted it to allow deferred rendering.

How to run with CMake

• Clone the project with git clone https://github.com/StormCreeper/Volumetric-Cloud-Rendering.git
• Update the dependencies if it is not done automatically: git submodule update --init --recursive
• In the root folder, run cmake -C build
• cd build, then compile with make (it may take some time to build the libraries)
• Finally, run the executable: ./IGR_Clouds

Implemented

• Traditionnal mesh rendering with rasterization
• Deferred rendering pipeline
• Volume raymarching and lighting, with multiple lights
• GUI to configure the lights and volume parameters
• Volume traversing in a pre-computed texture instead of mathematical function
• Compute the texture in a compute shader

Todo

• More accurated cloud volume generation with different kinds of noise
• Different heights of clouds (for the moment, they lie on a plane)
• Render the clouds at quarter resolution to speedup the rendering pass
• Flight simulator ??

Renders

Here are some renders with a basic density function and colored lights


First success with a 3D texture for the density map.

Changed the sky and volume shape to make it look like clouds:

Added a time offset and recomputing every 5 frames:

https://github.com/StormCreeper/Volumetric-Cloud-Rendering/assets/33285021/3514d8f1-56ba-4fa0-9bd2-03aa92fe8745 https://github.com/StormCreeper/Volumetric-Cloud-Rendering/assets/33285021/d30fc231-9c15-46cd-88e1-8565517668c5