Issue: Solids used in a block are not able to be displayed with transparency in AutoCAD. You have set the transparency for the layer but the block is still showing with no transparency.
Causes: Transparency of the individual solids is set to 0 preventing the control of transparency by the layer of the block.
1. Select the block -> right click on it and select Block Editor
2, Select the objects making up the block
3. Open the properties palette and type "ByLayer" for the transparency setting
4. Save the block
Products: AutoCAD;AutoCAD Architecture;AutoCAD Civil 3D;AutoCAD Map 3D;AutoCAD Mechanical;AutoCAD MEP;AutoCAD P ID;AutoCAD Plant 3D