[78]CG模擬水彩筆觸(PHOTOSHOP基礎篇)

[CG]抓老鼠的訣竅 10月30日, 2005 by 逗貓棒編輯部 |




  模擬水彩式的漸層的方法,在PAINTER與PHOTOSHOP的指令裡雖然有感覺相似的功能。PAINTER7之後的版本便有模擬水彩,但成果都過於水彩的形式(會流下來,顆粒等等性質)而非感覺,PHOTOSHOP的類似水彩筆頭的筆刷變成只有末段帶一點筆觸。很少有剛好適合的。

  下面介紹的是帶有一點紙張質感的水彩漸層,再經手工模擬真實水彩的流動模式。

使用軟體:PHOTOSHOP CS
 


1.底色
先選定一個亮面顏色作打底。


2.陰影
選想要的顏色顏色抓出顏色變化,用軟性噴槍塗上大致上的感覺。
(TIP:ALT+點取 可以吸取顏色,請多善用)


3.層次修正
吸取底下的顏色,用比較硬的筆刷,將層次感鋪陳的比較有手工的感覺,
順便改變成自己比較喜歡的對比度轉折。
(TIP:將筆刷的透明度調整為非100%可以有不錯的效果)


4.水彩漸層
使用手指工具,找到「Charcoal Large Smear」筆刷
(為PS預設的筆刷 內定為36大小) 開始溶解漸層。


5.修正
去除過多的紋理,補足太軟的漸層


6.對比度微調
由於用溶接的的對比度通常會過低,可以用LEVEL進行對比度微調。
盡量去除掉不想看到的地帶。


7.清理、完成
利用COLOR DODGE屬性的筆刷或是點選底色,反吃回不必要的陰影。

神秘的水彩手指的構造:

(水彩手指筆刷的構造)

  再來開始拆解這筆刷到底怎麼構成的,也方便知道如何找到最適合自己的設定。最後發現到最大的關鍵是「有質感的筆頭」和「SCATTERING」的混合體。作一個簡單的實驗,去把最基礎的筆刷多開啟「SCATTERING」屬性,發現到也出現柔和的混色,只是少了質感。所以得到「SCATTERING」是柔和混色的關鍵,「筆頭」影響到質感。各種變體就給各位去自己玩一玩吧~!

觀念解析:
  「SCATTERING」有「連續點一下」的屬性,而「手指工具」是將畫面中的顏色進行模糊。也代表每抹下去就會有一堆點以現在筆頭的樣貌模糊範圍內的色彩,導致一區塊顏色與顏色溶接(/模糊)。但也相對的產生過渡地帶會對比不足的缺點,只能靠之後補正。

缺陷與相對解決法:
1.缺陷:這種設定法如果筆刷放大太大,相當的消耗資源。
    畫圖如果不順便不是一個好選擇。
 解決法:另存一張縮小版的進行大體繪製,之後再把他匯入回原來的高解析度版。會犧牲些解析度,但事實上我們畫圖本身不會讓底色過於突出,所以不會成為大礙。
2.缺陷:分圖層問題。會無法與畫面混色
 解決法:A.擅用遮罩,取代原圖層的功能。
     B.以物件分圖層,開啟圖層保護,以物件為單位作圖。
     C.建議當作乾燥後上色的圖層用,改為白底MUTIPLY屬性

延伸學習:
  這套上色法建議可以去找一些水彩或彩色墨水相關的書籍去做延伸,可以發現到幾乎所有觀念都通用。也可以從傳統賽露露CG上色去做延伸,讓對比強烈的色塊與水彩融合。這是比較異於不透明媒材(例如油畫)的作業模式,有透明水彩基礎的人在這環境下說不定能找到新的揮灑空間。

    
(水彩擴散的痕跡)      (暈色產生的邊緣)
總結 & EXTRA:
  拆解神秘的「Charcoal Large Smear」筆刷後,或許你已經發現到PAINTER也可以辦的到相同的事情。觀念就是「JITTER」與「材質筆頭」的搭配。只是PAINTER本身影像微調沒有PHOTOSHOP方便,建議在自己熟悉的環境工作是最好的選擇。另外要模擬水彩的鬚鬚,暈渲等等(如上圖)都不是問題,只是要稍微動一些小方法就能辦到,有機會再對這部分作詳述。

  以上的主要還是有基礎水彩模擬,希望有機會帶給各位一些目前創作表現上的延伸。如果有更廣泛的應用也歡迎來做交流。


作者簡介:
闇暗kurudaz

目前正忙於畢製中的設計系學生,23歲。
最近在同人販售會場以「東方PROJECT」二次創作與「原創」屬性作品為主,
長期以半幽靈狀態活動中。

個人網站 ★Midnight Dessert★

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此迴響是由大溪地瓜餅所發表
發表時間:2005-11-03 01:18:56

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發表時間:2005-11-03 11:20:53

讚啊!!
正愁跑不動PAINTER要怎麼畫水彩筆觸的
太感謝了~

 
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