Based on the provided information, the film 'Muda Brasil' does not feature identifiable LGBTQ+ characters or themes. Therefore, its net impact on LGBTQ+ portrayal is rated as N/A.

Muda Brasil is a 1985 documentary chronicling Brazil's 'Diretas Já' campaign for direct presidential elections. The film focuses on political and social aspects of this historical movement, and there is no indication of transsexual characters or themes being present within its narrative or cast.

The movie does not contain any action or adventure elements.

As a documentary film, "Muda Brasil" (1985) primarily features real individuals and events rather than fictional characters adapted from source material. The concept of a 'gender swap' as defined, which applies to adaptations or reboots of established characters, does not apply to this film.

The film "Muda Brasil" is an original 1985 production. No information is available regarding source material, historical figures, or prior canon that would establish character races for comparison. Therefore, no race swap can be identified.