{"slug":"radial-blur-sky","title":"如何后期制作动感的天空和云层？浅谈PS模糊工具应用与边缘瑕疵处理","author":"Thomas看看世界","date":"2019-07-07","wechat":"https://mp.weixin.qq.com/s?__biz=MzI4NDA5MzE5NQ==&mid=2247489167&idx=1&sn=ad25f820d449efd1b4cd0b24ee928f56&chksm=eb81e8ebdcf661fd9e4e8d6ff0e6b0959e300b2521cede9abf06ca0ba046eeea5a4f1c45fb75&scene=21&token=684043739&lang=zh_CN#wechat_redirect","blocks":[{"t":"h","x":"Thomas看看世界","xe":"Thomas Chu Photo"},{"t":"p","x":"《修图小赛第9期》正在如火如荼的进行中。","b":false,"xe":"\"Photo Editing Contest No.9\" is in full swing."},{"t":"p","x":"在众多的投稿作品中，很多朋友都通过模糊的方式，让天空显得更加干净而且富有动感。","b":false,"xe":"Among the many submissions, many friends used blur to make their skies look cleaner and more dynamic."},{"t":"img","f":"img-02","w":1080,"h":516},{"t":"p","x":"在今天的视频教程中，托马斯会教大家应用Photoshop中的径向模糊、动感模糊、路径模糊等工具，制作漂亮的动感云层效果。","b":false,"xe":"In today's video tutorial, Thomas teaches you how to use Photoshop's Radial Blur, Motion Blur, and Path Blur tools to create beautiful dynamic cloud effects."},{"t":"p","x":"针对模糊边缘的瑕疵问题，托马斯也会提供２种解决方案。","b":false,"xe":"Thomas also offers 2 solutions for the edge artifacts that blurring can cause."},{"t":"h","x":"视频教程","xe":"Video Tutorial"},{"t":"bili","bv":"BV1T4411w7Jt","bpic":"bili-1","bt":"如何用PS模糊工具制作动感的天空云层？模糊边缘瑕疵的２种处理方式"},{"t":"p","x":"这一篇是上面视频的完整图文整理。素材来自修图小赛第 9 期的同一张原片——巴塔哥尼亚的菲茨罗伊群峰，前期天空平淡、光线一般， Thomas 在视频里演示了如何用 Photoshop 的径向模糊做出发散状的动感云层，以及模糊边缘「山的影子」两种干净的修复方案。整个过程 9 分钟，本文按操作顺序拆成四步，配上关键帧截图，适合先读图文建立框架，再回视频听细节。","xe":"This is the fully illustrated companion to the video above. The source is the same raw file from Photo Editing Contest No.9 — the Fitz Roy massif in Patagonia, whose flat, dull sky Thomas turns into radiating, dynamic clouds with Photoshop's Radial Blur, plus two clean fixes for the 'mountain shadow' edge artifact the blur introduces. The 9-minute walkthrough is broken into four steps below with keyframe screenshots — skim here for the framework, then dive into the video for the details.","b":false},{"t":"p","x":"先看总览：下面是处理前后的对比——原片天空平淡发灰，处理后云层以画面上方为中心向四周发散流动，雪山与前景秋色保持锐利，一张「慢门感」的照片就出现了。","xe":"Start with the overview: a before/after of the edit — the original sky is flat and grey; after processing, the clouds radiate outward from a point above the frame while the peaks and autumn foreground stay razor sharp. The long-exposure look, achieved entirely in post.","b":false},{"t":"img","f":"v01","w":852,"h":301},{"t":"h","x":"01 为什么模糊：既造动感，也藏瑕疵","xe":"01 Why Blur: Motion, and Hiding the Flaws"},{"t":"p","x":"修图小赛第 9 期给了大家同一张原片，前期难点很明显：天空非常平淡，光线也不算好。收到的投稿里，很多朋友不约而同对天空做了模糊处理——有的做类似镜像的发散模糊，有的做水平的动感模糊，有的直接把云层揉开（视频 0:29 处）。","xe":"Contest No.9 gave everyone the same raw file, and its weakness was obvious: a flat sky under mediocre light. In the submissions, many entrants independently blurred the sky — some with a radial burst, some with horizontal motion blur, some simply smearing the clouds apart (at 0:29 in the video).","b":false},{"t":"img","f":"v02","w":852,"h":480},{"t":"img","f":"v03","w":852,"h":480},{"t":"p","x":"模糊的好处有两个：一是让云层更有动感，二是把原来那些不好看的云层细节直接隐去——这也是「藏拙」的思路，细节没了，杂乱感也就没了。Photoshop 里能做这件事的工具有三个：动感模糊、径向模糊，以及模糊画廊里的路径模糊（视频 1:21 处）。路径模糊和动感模糊留到以后的教程，本期着重演示径向模糊。","xe":"Blurring earns its keep twice over: it makes the clouds feel alive, and it simply hides ugly cloud detail — remove the detail and the clutter goes with it. Three Photoshop tools can do this job: Motion Blur, Radial Blur, and Path Blur in the Blur Gallery (at 1:21 in the video). Path and Motion Blur are saved for future tutorials; this one focuses on Radial Blur.","b":false},{"t":"h","x":"02 径向模糊面板：数量、旋转与缩放","xe":"02 The Radial Blur Panel: Amount, Spin and Zoom"},{"t":"p","x":"动手前先多复制几层图层，操作失误随时可以退回来（视频 1:07 处）。然后打开「滤镜 → 模糊 → 径向模糊」。面板里第一个参数是数量，直接决定模糊的强度（视频 1:44 处）；模糊方法有两种——旋转和缩放；品质有草图、好、最好三档，选「最好」计算很慢而画质提升有限，一般选「好」就够了（视频 2:30 处）。","xe":"Before anything else, duplicate the layer several times so mistakes are always recoverable (at 1:07 in the video). Then open Filter → Blur → Radial Blur. The first parameter is Amount, which directly controls blur strength (at 1:44); Blur Method offers Spin and Zoom; Quality has Draft, Good and Best — Best is slow with little visible gain, so Good is the sensible default (at 2:30).","b":false},{"t":"img","f":"v04","w":852,"h":480},{"t":"p","x":"两种模糊方法的分工很明确：旋转模式让画面绕着一个圆心转圈模糊，基本只在拍车轮这类圆周运动时才用得上（视频 2:12 处）；对这幅照片的云层，应该选缩放模式——让画面以一个点为中心向四周发散。Thomas 先试了旋转模式给大家看效果，随即切回缩放（视频 1:56 处）。","xe":"The two methods have clear divisions of labour: Spin smears the image in circles around a center point — useful almost only for things like spinning wheels (at 2:12); for clouds like these you want Zoom, which radiates the image outward from a point. Thomas demos Spin first so you can see the difference, then switches back to Zoom (at 1:56 in the video).","b":false},{"t":"img","f":"v05","w":852,"h":480},{"t":"p","x":"以默认的画面中心为原心，直接确定之后，整张照片就向四周发散开了——这就是我们想要的云层模糊效果的雏形（视频 2:58 处）。","xe":"Leaving the center at the frame's default middle and clicking OK, the whole photo bursts outward — a first draft of the radiating cloud effect we are after (at 2:58 in the video).","b":false},{"t":"img","f":"v06","w":852,"h":480},{"t":"h","x":"03 模糊中心：决定云层的发散方向","xe":"03 The Blur Center: Where the Clouds Radiate From"},{"t":"p","x":"默认中心直接发散当然能用，但并不是最好的效果。径向模糊对话框里那个「中心模糊」的位置是可以按住鼠标左键拖动的——拖到哪里，模糊就以哪里为原心向外发散（视频 3:19 处）。预览里不会实时刷新，因为发散模糊需要计算，要点了确定才能看到结果。","xe":"The default center works, but it is not the best-looking option. The 'Blur Center' box in the dialog can be dragged with the left mouse button — wherever you put it becomes the origin of the radiation (at 3:19 in the video). The preview will not refresh live since the blur needs real computation; you only see the result after clicking OK.","b":false},{"t":"p","x":"比如把中心挪到右上角，确定之后整张照片就是以右上角为原心向外发散的（视频 3:47 处）。对这幅照片来说，最好的选择是中间偏上：云层会向斜上方发射，更符合真实情况——如果原心放在云层下方，云直接向上发散，就明显不符合透视关系了（视频 4:08 处）。","xe":"Drag the center to the top-right corner, for example, and after clicking OK the whole photo radiates from that corner (at 3:47 in the video). For this image the best spot is slightly above middle: the clouds then burst diagonally upward, which matches how the light actually behaves — put the origin below the clouds and they spray straight up, clearly violating perspective (at 4:08 in the video).","b":false},{"t":"img","f":"v07","w":852,"h":480},{"t":"img","f":"v08","w":852,"h":480},{"t":"h","x":"04 只模糊天空：选区蒙版与边缘修复","xe":"04 Blur Only the Sky: Masks and Edge Repair"},{"t":"p","x":"径向模糊是作用于整个图层的，但我们只想模糊云层、不想动地景。做法：用快速选择工具简单选出天空（本例为省时间处理得比较粗糙），再「选择 → 反向」选出地面，点建立蒙版——这样模糊图层只显示地面部分，把它拖到图层面板最上方，下方就是模糊过的天空，地景保持完全清晰（视频 4:31 处）。","xe":"Radial Blur hits the whole layer, but we only want the clouds blurred, not the foreground. The fix: roughly select the sky with the Quick Selection tool (kept crude here for speed), run Select → Inverse to grab the ground, and add a layer mask — the blurred layer now shows only the ground. Drag it to the top of the stack, and the blurred sky sits below while the landscape stays perfectly sharp (at 4:31 in the video).","b":false},{"t":"img","f":"v09","w":852,"h":480},{"t":"img","f":"v10","w":852,"h":480},{"t":"p","x":"但这里会出现模糊几乎总会遇到的问题：发散模糊在边缘会把下半部分——也就是地景那座山的影子——一起拖进天空里，山脊线上方出现一圈被拉进云里的「鬼影」（视频 5:11 处）。这就需要一些手段来处理，Thomas 给了两种方案。","xe":"Here comes the problem almost every radial blur runs into: at the edges, the radiating smear drags the lower part — the silhouette of the mountain — up into the sky, leaving a ghostly halo of pulled-up terrain along the ridgeline (at 5:11 in the video). Two fixes follow.","b":false},{"t":"p","x":"方案一非常简单：把天空模糊层往地景后面塞。选中模糊层，执行「编辑 → 变换 → 变形」，把露出山影子的部分往下拖，拖到山的后面去藏起来；往下拖会在上方露出空隙，再把上半部分也往下拖回去填补（视频 5:45 处）。确定之后，只有天空是模糊的，地面完全清晰，而且边缘非常干净。","xe":"Fix one is dead simple: tuck the blurred sky layer back behind the landscape. Select the blur layer, run Edit → Transform → Warp, and drag the part showing the mountain shadow downward until it hides behind the mountain; dragging down opens gaps at the top, so pull the upper part down as well to fill them (at 5:45 in the video). Once confirmed, only the sky is blurred, the ground stays sharp, and the edge is spotless.","b":false},{"t":"img","f":"v11","w":852,"h":480},{"t":"p","x":"方案二则是在模糊之前就下手：删掉刚才的图层，回到模糊前的那一层，用仿制图章——按住 Alt 在云层处取样——把靠近云层的山体部分涂盖成云。反正等会地景会用上面的图层重新盖回来，这些涂抹完全不会露馅；而且涂得糙一点也没关系，现在看着假，模糊一过，细节被进一步抹掉，看起来就非常自然了（视频 6:42 处）。接着再用同样的参数跑一次径向模糊，数量还可以稍微加大（视频 7:47 处），盖回地景图层后看不出任何破绽。","xe":"Fix two strikes before the blur: delete the layer, go back to the pre-blur copy, and with the Clone Stamp — Alt-click to sample from the clouds — paint cloud texture over the mountain flank near the ridgeline. The ground will be covered back by the layer above anyway, so these strokes can never show; and sloppy work is fine — it looks fake now, but after the blur smears the detail away it reads perfectly natural (at 6:42 in the video). Then run Radial Blur again with the same settings, nudging the Amount slightly higher (at 7:47), put the landscape layer back on top, and not a trace remains.","b":false},{"t":"img","f":"v12","w":852,"h":480},{"t":"p","x":"最终效果：天空呈发散状的流动感，非常有冲劲、有质感，边缘又干净利落——等于用后期模拟了前期加减光镜长曝光才能拍出的云层拉丝（视频 8:19 处）。当然，光靠径向模糊可能还有些不自然的地方，后续可以再用路径模糊和动感模糊做进一步雕琢，这部分会在以后的教程里继续分享。","xe":"The final result: a sky full of radiating, flowing energy with crisp clean edges — the streaked-cloud look of a real long exposure with an ND filter, recreated entirely in post (at 8:19 in the video). Radial Blur alone can still leave something unnatural; Path Blur and Motion Blur can refine it further, and that is where the next tutorials will pick up.","b":false},{"t":"img","f":"v13","w":852,"h":480},{"t":"quote","x":"1. 天空平淡光线差时，用径向模糊的缩放模式让云层向四周发散，既制造动感又隐去杂乱细节，等效模拟减光镜的慢门拉丝；2. 旋转模式留给车轮等圆周题材；品质选「好」即可；模糊中心可拖动，放在中间偏上让云层斜向上发散才符合透视；3. 模糊作用于整层，用快速选择+反向+蒙版把地景盖回最上层；4. 边缘鬼影两种修法：变形工具把山影拖回山后，或模糊前先用仿制图章把山脚涂成云——涂得糙不怕，模糊会替你抹平。","xe":"1. When the sky is flat and the light is poor, Radial Blur in Zoom mode bursts the clouds outward — adding motion, hiding clutter, and faking an ND-filter long exposure; 2. Save Spin for circular subjects like wheels; Quality 'Good' is enough; drag the blur center slightly above middle so clouds radiate diagonally upward, matching perspective; 3. The blur hits the whole layer, so mask the landscape back on top with a quick selection, inverse, and layer mask; 4. Two fixes for the edge ghost: Warp the mountain shadow back behind the ridge, or clone cloud texture over the mountain foot before blurring — sloppy strokes are fine, the blur smooths them away."}],"titleEn":"How to Create Dynamic Skies in Post: PS Blur Tools and Edge Artifact Fixes"}