# Edit Grease Pencil Strength

i've just started studying Grease Pencil and did some basic animations. After some work i've noticed that all my strokes were painted with a semi transparent strength.

Can i change the strength of my strokes after i've drawed them? i'm sure is not a matter of material opacity.

edit: i've obtained what i'm looking for using the modifier Noise for grease pencil , but i'd like to make it permanent, moreover, when i click apply Blender Crashes

thank you.

• Have You found solution for changing strength after drawing? Please let me know if yes. I have same problem right now. Commented Jan 8, 2021 at 15:16

You can go to the Sculpt mode, and use the Strength brush.

• Thank you very much sir ;) Commented May 13, 2019 at 15:36
• Yes! This was driving me nuts and would never ever have thought of going into sculpt mode, thank you! Commented Mar 7, 2020 at 17:17

You can add an Opacity modifier to the Grease Pencil object.

Set the type to Uniform and keep the Strength to $$1$$ to get full opacity.

If Uniform is unchecked, the factor will act as an addition to the stroke, but it acts in an unintuitive way.

Between $$0$$ and $$1$$, the factor will decrease the opacity by a set amount. (eg with a factor of $$0.6$$, the opacity will decrease by $$1 - 0.6 = 0.4$$).

Similarly, between $$1$$ and $$2$$, the opacity will increase by a set amount. (eg with a factor of $$1.4$$, the opacity will increase by $$1.4 - 1 = 0.4$$).

Note that you can also apply the modifier to a fill, but it will only decrease the opacity, never increase it.

There is now a shortcut to do that: Shift+F
It works in Edit Mode and changes the opacity of the selected strokes (so you can just press A before to select all of them)
It works with version 2.93 (but maybe already with 2.92?)

• This is so much better because sculpt can be really slow when their are many strokes. Commented Dec 13, 2023 at 0:28