| Option Category | # # DIRECT3D POST-PROCESSING OPTIONS # |
| Description | This option sets the strength of the hum bar effect drawn by the HLSL renderer. |
| Full Command | -hum_bar_alpha <float> |
| Alt. Command | none |
| Reverse Command | none |
| Example | mame64 pacman -hlsl_enable -hum_bar_alpha 0.05 |
| mame.ini Command | hum_bar_alpha |
| Command Default | 0.0 |
| Argument Format | <float> |