Lens Studio currently doesn't remember the state of disabled elements so when we enable From Camera, we disable Specular Envmap, and its settings get reset.
The workaround is to:
- Disable From Camera
- Set the Specular Envmap texture to what you need.
- Expand the settings of Specular Envmap (triangle on the left).
- Enable Mipmaps
- Change Filtering Mode to Trilinear