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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.

screen

detail

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

noise modifier on strength

thank you.

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  • $\begingroup$ Have You found solution for changing strength after drawing? Please let me know if yes. I have same problem right now. $\endgroup$
    – Bernard
    Commented Jan 8, 2021 at 15:16
  • $\begingroup$ @Bernard Does any of the answers help you ? $\endgroup$
    – Gorgious
    Commented Jan 8, 2021 at 16:28

3 Answers 3

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

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

enter image description here

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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?)

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

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