How to make your crosshair transparent in CS:S

Type cl_crosshairusealpha 1, then cl_crosshairalpha 150 in your game console. 0 is invisible and 255 fully solid.

cl_crosshairalpha

Sets crosshair transparency, from 0 (invisible) to 255 (solid).

cl_crosshairalpha <alpha>

Examples

cl_crosshairalpha 255

Fully solid.

Arguments

alphaRequired: Opacity from 0 to 255.

What it does

Only used when cl_crosshairusealpha is 1.

Use it in your game

Type it in your own game console: turn on the developer console in the game's settings, then press the key under Esc. To keep it, put the line in cstrike/cfg/autoexec.cfg.

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