Problems with brush influence in sculpting

[issac (楊 景貴)]

HI Everybody can help me solve this problem?
Or … everyone does not think this is the problem ???

PS
The language I am familiar with is Chinese
All rely on google translate
And forgive me, new users can only put a picture in the post.
 
 
 

p.1
如果我們在Blender的雕刻模式，進行直線雕刻(如上圖)，從模型最右邊畫到最左邊。
PS.請看預期形狀。
If we are in Blender’s engraving mode,Carry out a straight engraving (above) Draw from the far right of the model to the left.
PS. Look at the Desired result shape.
 
 
p.2
但是在Blender中筆刷 影響力的作用基準點是筆刷的中心點，而不是所有筆刷的範圍； 當筆刷中心超出模型時就不影響模型了。
However, the reference point for the brush influence in Blender is the center point of the brush, not the brush range of all brushes; the model is not affected when the brush center is beyond the model.
 
 
p.3
… 因為這樣的原因，所以每種筆劃方式，在模型邊緣都會有奇怪的不正常現象。
… Because of this reason, each stroke method will have strange abnormalities at the edge of the model.
 
 

[Felix_Kutt (Felix Kütt)]

Hi, for best results every stroke should begin on the mesh surface not in empty space. Hope that helps.

嗨，为了获得最佳结果，每个笔画应该从网格表面开始，而不是在空白空间中。 希望有所帮助。

[issac (楊 景貴)]

那麼像這樣的裙擺，就沒辦法用雕刻的方式製作出來 >< …
So skirts like this cannot be made by engraving >< …

[radio_active]

You can start a brush stroke outside of an object’s silhouette if you enable 2D falloff in the brush options:

[issac (楊 景貴)]

我的blender 是2.79 但沒有這個選項???
是我遺漏了甚麼嗎?

My blender is 2.79 but not this option???
Am I missing something?

[radio_active]

Oh sorry, this was added a few months ago so you need a recent 2.79 build from here:
https://builder.blender.org/download/

[Felix_Kutt (Felix Kütt)]

Sure they can. Start from inside and work your way outwards.
当然可以。 从内部开始，向外发展。

[issac (楊 景貴)]

thx U help ^^

[issac (楊 景貴)]

我有下載來使用了，效果很好 ^ ^
但不知道是甚麼原因，有時候會無預警的當機
希望未來的穩定版本可以使用
I have downloaded to use, it works well ^ ^
But I don’t know what the reason is, and sometimes there’s no early warning.
Hope that the future stable version can be used