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所在平台: Udemy |
课程主页: https://www.udemy.com/course/blender-visual-effects/
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课程名称：Blender VFX教程：在真实背景中为逼真的汽车进行绑定与动画 概述：在本教程中，我们将学习如何通过将逼真的汽车添加到真实背景图像中来制作视觉特效（VFX）。 第一部分：绑定您的汽车模型 下载车辆后，我们需要将底盘和轮子分开，作为独立的物体。使用‘L’键选择模型的部分，按‘P’将它们分开。为了让CarRig插件理解模型的每个部分，我们需要为它们命名： - 底盘命名为‘car.body’ - 轮子的命名顺序如下： - 前右轮：‘car.Wheel.Ft.R’ - 前左轮：‘car.Wheel.Ft.L’ - 后右轮：‘car.Wheel.Bk.R’ - 后左轮：‘car.Wheel.Bk.L’ 确保每个物体的锚点位于中心，以便轮子围绕中心旋转。现在一切准备好了，我们可以生成汽车绑定。 第二部分：使用fSpy获取正确的透视 我们将把背景图像导入fSpy，并将X轴对齐到汽车行驶的主路线上。然后导出该.fSpy文件，并创建道路和人行道，把车辆放置在这条路径上。 第三部分：逼真的光照：寻找合适的HDRI图 这一步骤至关重要，我们必须找到一个与背景场景相似的HDRI。需要研究场景的一切：是城市吗？天气如何，是雨天还是晴天？这将使我们的CGI与背景融合，否则将显得不自然并且效果容易被识别。可以通过添加‘映射’和‘纹理坐标’两个节点，旋转HDRI以使车辆的反射与周围环境相匹配。 第四部分：设置VFX参数 首先，我们需要在渲染中隐藏道路，但必须保留阴影。没有阴影无论其他设置多好，VFX效果都会失败。选择道路，进入“对象设置”，选择可见性，确保您使用的是循环引擎，因为该效果在Eevee中尚不可用。检查‘阴影捕获器’。第二个设置在“渲染属性”中，选择“影片”，然后选择“透明”。现在，如果您渲染场景，进入合成设置并勾选‘使用节点’，您将看到我们的汽车。接下来，将阿尔法渲染与背景合并。需要添加一个图像节点，选择背景，并将两个节点连接到‘Alpha Over’节点，不要忘记添加一个‘缩放’节点并设置为‘渲染大小’。 基本上，就完成了您的VFX效果！
In this new tutorial we will learn to Make VFX effect by adding a Realistic Car into a real Background ImagePart 1: Rig your Car ModelAfter downloading our vehicle, we need to separate the chassis and the wheels as separate objectsYou can use the ‘L' key to selection parts of your model, press ‘P' to separate themNow it order for CarRig addon to understand each part of our model, we need to give them specific names- Chassis: we need to name it ‘car.body'- Wheels: The order should go like this ‘car.Wheel.Bk.R'- Front right wheel -> Car.Wheel.Ft.R- Car.Wheel.Ft.L- Car.Wheel.Bk.R- Car.Wheel.Bk.LAlso make sure to leave the anchor point of each object to the center because we want the wheels to rotate around their center pointAll is set by now, we can go ahead and Generate a Car RigPart 2 - Use fSpy to Get Right PerspectiveWe will import our background image into the fSpy and set the X axis to be aligned with the main road where our car will be moving onThen we will export that.fSpy file and create the road with the sidewalk and Put our vehicle into that pathPart 3 - Realistic Lighting: Find the Right HDRI MapNow this step is essential, we must find an HDRI that looks pretty close to our background sceneWe should study everything: is it urban? How's the weather.. is it rainy or sunny?This is what's gonna allow our CGI to blend into the background, otherwise it will look suspisious and our VFX will be easily spottedWe can also play with our background by adding the 2 nodes ‘Mapping & Texture Coordinates' which gonna allow us to rotate our HDRI until the reflection of our vehicle matches it's surroundings carsPart 4 - Set VFX SettingsFirst we need to hide the road in the render Buuut we need to keep the shadow.. Without the shadow, the VFX will collapse no matter how good you put the other thingsSelect RoadGo to "Object Settings" and Choose Visibility.. Make sure you're on Cycle engine, this effect doesn't work in Eevee yetFrom there you can check ‘Shadow Catcher'The second setting you need to set is in the "Render Properties", then "Film" and choose "Transparent"Now if you render your scene, jump into the compositing and check ‘Use Nodes' you will see our CarNow it's time to merge between our Alpha render and our BackgroundSo let's add an image node, choose the background and connect both nodes to an ‘Alpha Over' and don't forget to add a ‘Scale' node set to ‘Render Size'And Basically that's it, you got your VFX working
