The Coefficient property of the Semi-transparent effect has been replaced by a Blend Coefficient property. For compatibility reasons with HWA features this property now takes a value from 0 to 255, instead of 0 to 128. The old "Set Semi-transparency" action still uses values between 0 and 128 so your existing applications are 100% compatible. You can either continue using this action, or use the new "Effect / Set alpha-blending coefficient" action instead (this one takes a value between 0 and 255). Note: be careful, in non Direct3D display modes the 0-255 coefficient used by this new action is internally converted to a 0-128 value, so when you retrieve it with the new "Effect / Alpha-blending coefficient" expression you may get a different value (for example if you set it to 241, you'll get 240).