During the latter half of the 1990s, grunge was supplanted by post-grunge, which remained commercially viable into the start of the 21st century. Post-grunge "... transformed the thick guitar sounds and candid lyrical themes of the Seattle bands into an accessible, often uplifting mainstream aesthetic". These artists were seen as lacking the underground roots of grunge and were largely influenced by what grunge had become, namely "a wildly popular form of inward-looking, serious-minded hard rock". was a more commercially viable genre that tempered the distorted guitars of grunge with polished, radio-ready production. When grunge became a mainstream genre, major labels started signing bands that sounded similar to these bands' sonic identities. Bands labeled as that emerged when grunge was mainstream such as Bush, Candlebox and Collective Soul all are noted for emulating the sound of the bands that launched grunge into the mainstream. Although the bands Bush and Candlebox have been categorized as grunge, both bands have been largely categorized as too.