When both schematic overlays (in this example for a missing block) and renderBlocksAsTranslucent are enabled and actually doing something (alpha of 0%/100% behaves differently), then schematic blocks become much too translucent:

This is with schematicOverlayColorWrongBlock #01FF4CE6 and ghostBlockAlpha 0.99. I would expect it to look very similar to an actual block, except for a slight pink tint and a very faint guess at what's behind it. Instead, it becomes so transparent that I can barely tell which block it's supposed to be. This does not happen without overlays or without transparent schematics, those two cases work fine.

• Minecraft version: 1.18.1
• Mod version and malilib version: litematica-fabric-1.18.0-0.9.0.jar, malilib-fabric-1.18.0-0.10.0-dev.26.jar

This is actually not just too transparent, it's also too bright, independent of what's behind it.