The campaign, in solidarity with author Ahmed Naji, launched Thursday a series of video messages from intellectuals in support of creative freedom.
In the first video, well-known Egyptian scriptwriter Medhat El Adl said the sentence against novelist Ahmed Naji came as an "extreme shock" to writers and artists, and expressed concern for the future of art in Egypt.
"If this is how it is, my published novels contain things that would put me in prison too," said best-selling author Alaa al-Aswany, adding that he has signed petitions, along with hundreds from the field, requesting Naji be freed.
"We are many, and our voice is rightfully loud; We have three hostages taken by the state," said author Mahmoud el-Wardany at a conference Wednesday discussing ways to support the creative scene. "I ask that the pressure be very strong."
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The growing movement by Egyptian intellectuals protesting the cases also includes Culture Minister Helmy el-Namnam and two former culture ministers, members of the committee that wrote Egypt's current constitution, and the Egyptian Publishers Association.
A new satirical page was launched on Facebook mocking the idea of violating someone's "modesty" and posting drawings of explicit material from ancient Egypt and Arab heritage.
Rights lawyers and activists say cases filed by the public prosecution against writers and thinkers for issues related to "virtue" or religion have spiked under the rule of President Abdel-Fattah el-Sissi, who has called for religious reforms to combat extremism.