Opis
Precautions：
This blueprint cannot be used for turning on lights or ray tracing，Shadows can cause problems。Clouds cannot cast shadows on other objects，But other objects can cast shadows on clouds。
There is a compatibility issue with the distance field shadow code of the custom node in UE5.5. The DistanceFieldShadowSteps parameter in the blueprint needs to be changed to 0. I will investigate the specific cause later
No need to load any plugins。
In UE, use HLSL code to project volume maps into cloud based material blueprints for production. Used in custom nodes of Unreal Engine to calculate the transmittance and lighting effects of light rays in volumetric media. Implemented basic volume scattering effects, suitable for real-time rendering scenes such as clouds and fog.
Volume maps can be created through Houdini，This project provides 60 volume maps
By switching volume maps to transform the shape of clouds, the density, shadows, color, sampling, and other aspects of the clouds can be adjusted。
Create a video:
https://www.youtube.com/watch?v=8_rIXBqp6ic
Article reference：https://shaderbits.com/blog/creating-volumetric-ray-marcher