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Expresii On A US$150 Windows Tablet: Sketches (Pt 3)

30/12/2014

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Let's try some Chinese Brush sketching!   走,試毛筆速寫去!

[Continuing from last entry] So we took the W5 out and tried sketching on it with Expresii Lite. Frankly, the W5 is not a powerful machine and the frame rate is only 35-50 FPS.  While you can easily get 10 hours of usage for an iPad, the W5 only gives you less than half of that, like 4-5 hours. The W5 doesn't come with a built-in stylus pressure curve adjustment tool (Wacom's driver does) and the larger Hanvon stylus feels too hard on the W5. We will add  an adjustment tool  in Expresii to help with the situation later. 
[續上回] 今回要試試拿 Pipo    W5 用 Expresii Lite 出外寫生了!因w5 比較慢,其實不能‘速寫‘啊,筆劃如果太快會出角,畫者要自我調整。還有W5 續行一般,只有4-5 小時,比較下 ipad 則可以有10小時。那支漢王筆用起來比較‘硬’,要適應一下,我們之後增加軟體筆壓調控到Expresii 去改善情況好啦。

We found that unplugging the machine from power doesn't affect the drawing frame rate. This suggests that the CPU throttling  works really well in lowering the CPU frequency while you're not painting, and increasing it while you are. 沒接電源,感覺沒影響繪畫速度,都是 35 到 50 FPS。
I ended up doing only rough sketches and then finished them when I got home, with the luxury of a Wacom Intuos 3, which gives me stylus-tilt sensing. 
最後還是把sketch 帶回家來完成,而且忍受不了 W5 沒有筆的斜度感應,用回wacom的 intuos 3了!W5 是一部完整的Windows PC,是可以連接intous的。以下是完成了的作品,隔天帶回原地對比拍照,呵呵。

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Tip: hold the stylus vertical to the surface, so that the pressure gets registered. 
I was so tempted to slant the brush when I need to do texturing, just like in traditional painting - only to be frustrated by the W5 not supporting tilt sensing and that a too-tilted stylus won't get its pressure registered.

有別於西畫,中國畫重線條表現,毛筆的使用為之關鍵。傳統“皴法”很多需要側鋒用筆,W5沒有筆的斜度感應,只能透過UI調好角度才下筆,發揮不得意。W5屏幕較小,畫畫時經常需把畫面放大縮小,但好處是可以單手拿著來畫。

Conclusion

If for sketching with the W5, the pros and cons are:
Pros:  
  • Very portable - can be held with one hand
  • Very affordable
  • Nice IPS screen
  • No fan - completely silent
  • metal back helps heat dissipation
Cons: 
  • Too slow for fast strokes
  • Only 4-5 hours of play
  • Stylus not working near screen edges
  • Stylus can't be tucked into the device
  • No stylus tilt nor eraser tip support
Granted, the W5 is not a perfect sketching tool, but given its price which is only 1/12 that of a Wacom Cintiq Companion and 1 / 5.3 that of a Surface Pro 3, you should consider it if you are on a budget. 

用W5來畫畫並不完美,但它的價格是最便宜那款Wacom Cintiq Companion (US$1800) 的1/12,最便宜的Surface Pro 3 (US$800) 的 1 / 5.3,初心者可以考慮 (btw, Cintiq Companion 其實挺重的)。期待下一批 Core-M 跟Cherry Trail 平板於2015年的出現,並希望廠商可以加入筆的斜度感應,配合我們Expresii 軟件,打造完美的毛筆水墨寫生利器!

Update 12/31: The maximum output size of these sketches generated by the W5, which has only 2GB of RAM, was 5,120 x 7,680 pixels. If you load the artwork on a desktop with a discrete GPU, you can easily get 8k x 12k.
測試發現,用W5輸出,最大為5,120 x 7,680,但你可用家裡有獨立顯卡的電腦讀進作品檔,就可輸出高達 8k x 12k 的圖檔了!

Check out the 5k x 7k output at here.
Update 1/6: The following are screenshots showing you the details of one of the sketches we did (in case you can't watch the youtube video above). It's amazing what such a small device can handle. 
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