2011/05/10

Smoke, fire and explosion火焰,煙霧,爆破特效參考


時候我們在調特效的時候追求寫實的效果, 但是什麼是真實呢? 像FumeFX這種有上百個參數如果隨意排列組合調出來大概也調不出來, 所以還是要以真實的照片當作參考; 可是有時候並不是軟體使用的人笨, 而是軟體本身的侷限就無法達到完全真實.

如果仔細查看真實的火焰, 煙霧或是爆炸的照片就會發現, 真實世界裡面的特效都具有無窮鏡的細節, 這些細節幾乎是無法用CG電腦模擬出來的; 或者是說, 為了追求那樣的細節, 必須要花費上百G甚至上千T的快取資料來產生該有的細節.

以實用的角度來說, 只要達到讓人信服的細節就夠了吧. 例如上圖筆者以約2GB的cache用PhoenixFD產生的煙霧, 爆炸. 要有更多細節其實也不是不行, 但是需要更多的快取, 更久的模擬時間, 考驗大家的耐心了~

這邊整理了收集的真實煙霧, 火焰, 爆破的照片當作日後製作上的參考:

Smoke 煙霧























fire 火焰



















explosion爆破



























FumeFX做出的效果










Phoenix FD做出的效果



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2011/05/01

Tutorial: tearing cloth in 3ds max 2011


In this quick and concise video tutorial I will show you some of tips & tricks when creating realistic tearing cloth in 3ds max 2011. This is for advanced user, no plugin required but to tweak for better results, we will use SuperMesher (optional) in this video.

You might find 3ds max 2011's Garment Maker unstable, convert plane to NURBS, and use delauay approximation to avoid that problem.

To optimized simulation performance, we model the cloth with adaptive resolution (with help of HSDS modifier).

The tearing effect was enhanced if you paint the tearing group in parallel (vertical) stripes. The strength controls how vertex will stick together.

Supermesher help us to catch cloth animation, not only increase playback performance, but we could add more modifier (FFD, noise...etc) on top of it. Click HERE to the product page of Supermesher.

When cloth were ripped, since some verties are break which will break polygon's smooth group. We could add Welder modifier to fix this problem. Add turbosmooth or shell modifier to increase resolution of your final results.

Video tutorial (watch in 1080P resolution and fullscreen mode you should see button labels clearly) :


watch in Vimeo click HERE

I hope you find this video useful. ; )

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