不知從哪天開始，我的ue4.13就突然無法成功構建光照了，
症狀為：雖然swarm連接到了100%，然而之后就卡住一動不動，一看看log是連接tcp什么agent什么失敗的。
雖然把所有物體都設置成非靜態可以不構建光照也不會有紅字。。但還是不甘心
於是趕緊去官網社區學習一個：
先是第一個映入眼簾的方案1——改swarm的配置：
主要就是把enablestandalonemode這一項從false改成了true，
然並卵
再次構建仍是同樣的結局。。
於是我繼續尋找解決方案，冒出了方案2，有個說什么和windows安全策略有關，原文如下：
By googling it, I found this web page
http://www.sitefinity.com/developer-network/knowledge-base/details/this-implementation-is-not-part-of-the-windows-platform-fips-validated-cryptographic-algorithms-exception , that explained to Go to Start > Control Panel > Administrative tools > Local Security Policy. The Group Policy dialog appears. Under the "Local Policies" heading, select "Security Options" and look for the entry, "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing." If this entry is enabled, disable it. Open the registry editor and browse the following path. Make sure this registry subkey is set to 1: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\fipsalgorithmpolicy
Which I've done and straight after this it worked again! Hope it can help people who have been stuck with this thing!
Thanks
Geoff
http://www.sitefinity.com/developer-network/knowledge-base/details/this-implementation-is-not-part-of-the-windows-platform-fips-validated-cryptographic-algorithms-exception , that explained to Go to Start > Control Panel > Administrative tools > Local Security Policy. The Group Policy dialog appears. Under the "Local Policies" heading, select "Security Options" and look for the entry, "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing." If this entry is enabled, disable it. Open the registry editor and browse the following path. Make sure this registry subkey is set to 1: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\fipsalgorithmpolicy
Which I've done and straight after this it worked again! Hope it can help people who have been stuck with this thing!
Thanks
Geoff
然而，我在win10根本找不到傳說中的Local Security Policy。。。知道怎么打開這個設置的的可以一試
接下來是方案3，意思也差不多，要允許防火牆通過，我干脆把防火牆關了，也毫無卵用。。。。。。
於是我就繼續依靠設為可移動物體勉強維持，
直到有一天！
我突然覺得自己的物品欄好low，雖然嘗試過不同的背景圖總免不了山寨氣息，經過對比我正在玩的絕地求生大逃殺，幡然醒悟——物品欄ui什么的可以很簡潔，但前提是背景要虛化。
於是我趕緊進入控件藍圖尋找傳說中的blur，竟然搜出來一片空白！原來這竟然是4.15版本的新特性！
下載新版本雖麻煩，但看着眼前的ui心有不甘，再加上要與時俱進的理念，我果斷打開epic launcher添加了新版本！
果然發現多了一項的功能，
於是畫面就能成功變模糊了
之后，我又突發奇想：“會不會因為版本換了就能成功構建光照了呢？”
我點下了僅構建光照，幾乎做好了任務管理器立即結束的准備了。
然而，swarm連接到100%以后，雙擊點開swarm，那個進度條居然在動！！
數秒之后，光照構建完成了！！！
實在是很棒棒哦
最終總結
所以如果你遇到和我一樣的問題，最靠譜的解決方法就是更新引擎版本啦，如果已經是最新版，那就試試刪了重裝吧。。