Steven Schneider has come aboard “ Imposters ,” Caleb Phillips’ science-fiction thriller that drew notice at SXSW Austin last month, as executive producer under his indie genre label Spooky Pictures. Schneider co-founded Spooky Pictures in 2020 with Roy Lee, with credits including “Late Night With the Devil” and “Strange Darling.” The label’s current slate includes “Hokum,” starring Adam Scott and acquired by Neon; David Dastmalchian vehicle “The Shepherd”; and “The Plague,” directed by Charlie