Function rin::gl::image_based_light::generate_irradiance_cubemap

pub fn generate_irradiance_cubemap(
    envmap: &CubeMap, 
    size: u32, 
    color_format: ColorFormat, 
    gl: &Renderer<'_, Screen>
) -> CubeMap

Generate an irradiance (diffuse) map from a cubemap environment map as a cubemap