What are the visa & residency requirements in Namibia?

"In order to visit Namibia, foreign nationals must obtain a visa prior to arrival. The process of applying for a visa involves submitting an application form, a valid passport, two passport-sized photographs, and a fee. Depending on the purpose of the visit, additional documents may be required. In order to obtain residency in Namibia, foreign nationals must submit an application form, a valid passport, two passport-sized photographs, a fee, and proof of sufficient funds. Depending on the purpose of the residency, additional documents may be required. The application process may also involve an interview with a representative from the Namibian Immigration Department," said another expat in Namibia.