Mixing clear and white resin to get a more translucent result?

The Color Base material is akin to White v1 (comparison between v1 and v2 here), but it’s still fairly opaque and might not work for your project. What sort of application are you working on? There might be surface treatments or other processes that work for this. Otherwise, experimenting with resin mixes in Open Mode is your safest bet, but dialing in the clarity you’re looking for with a blend might prove challenging.