Utilizar mipmaps en una render texture?
When set to true, rendering into this render texture will create and generate mipmap levels. By default
render textures don't have mipmaps. This flag can be used only on render textures
that have power-of-two size.
Por defecto los mipmaps serán automáticamente generadas. Si usted quiere renderizar a niveles mip de textura manualmente, defina generateMips a false.