Activity › Forums › Maxon Cinema 4D › “Transparency” and “Alpha Mode” are grayed-out in viewport menu. Maxon Cinema 4D “Transparency” and “Alpha Mode” are grayed-out in viewport menu. Posted by Jun Tanaka on May 28, 2019 at 4:38 am Hello, “Transparency” and “Alpha Mode” are disabled in viewport menu. Open GL is on. Could you kindly let me know how to resolve this? Best Regards, Jim Scott replied 7 years, 2 months ago 2 Members · 3 Replies 3 Replies Jim Scott May 28, 2019 at 5:37 am You need to have Hardware OpenGL checked on in the Preferences. Jun Tanaka May 28, 2019 at 5:41 am Thank you, Mr. Scott. It works just fine. Jim Scott May 28, 2019 at 5:46 am Glad to be of help. Reply to this Discussion! Login or Sign Up Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me Reply to this Discussion! Login or Sign Up