pub fn create_texture_mapping2d(
tex2world: &Transform,
tp: &TextureParams<'_>,
) -> Result<Box<dyn TextureMapping2D>, PbrtError>
pub fn create_texture_mapping2d(
tex2world: &Transform,
tp: &TextureParams<'_>,
) -> Result<Box<dyn TextureMapping2D>, PbrtError>