The actress recently joked to reporters that she actually "overgroomed" in preparation to strip down for director Sarah Polley's comedy.
"The actual day wasn't bad. It was very supportive, and you forget it once you do it, but the morning leading up to it, I overgroomed," Silverman said, according to The Hollywood Reporter.
She added: "You know when [you're] even and even and even until nothing's left? It was bad. Never try to even from the top. Let the top be the top... It was all right. I wish it was fuller. Michelle [Williams]'s was so full and awesome."
Silverman revealed that the nudity doesn't come across as overtly "sexual" because it occurs in a scene of woman showering at a health club.
"The thing, and I want to be able to say this because Sarah Polley isn't here, but she always says she wrote that scene because women are naked together all the time," she explained. "You're in the shower at the Y, or one of you is in the tub and one of you is reading a magazine, you're hanging out and trying on clothes - it's such a common, everyday thing for women that's never reflected in movies."
Silverman continued: "There's so much nudity in movies, but it's always sexual… You never see nudity that is not in a sexual way, so this is that.
"And I'm in it, and ego-wise it's horrifying, but if I can take myself out of it, I think it's amazing. It's jarring. It's genuinely jarring because it's not funny, it's not sad, it's not dramatic - it's kind of everyday life."
Michelle Williams, Seth Rogen and Luke Kirby co-star with Silverman in Take This Waltz, opening on June 29 is US cinemas. A UK release has yet to be announced.
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Watch a Take This Waltz trailer below: