Advanced Compositing – Keying & Creating 2.5D Projections

这个高级合成工作坊将指导您从头到尾完成一个镜头的合成，并遵循在真实视效制作环境中所需的原则。在3.5小时的课程中，您将合成一个照片级逼真的视效镜头，同时学习高级/首席合成师兼首席数字绘景师Meliza提供的技巧和窍门，包括如何解决即使是专业人士在使用Nuke时也会遇到的常见合成问题。

Meliza首先讲解色彩空间，讲解如何在不损害原始日志板的情况下进行线性工作。然后，您将在Nuke中创建3D摄像机轨迹，并利用这些信息构建2.5D背景。Meliza为订阅者提供分层的数字绘景工具；她会指导如何将这些图层投影到卡片上。Meliza还会讲解她在制作中经常使用的重要抠像技术，这些技术即使在最困难的绿幕和蓝幕镜头中也已被证明行之有效。

完成背景追踪和抠像后，Meliza 将演示如何从 Action VFX 添加 2D 元素，使环境栩栩如生。最后一步，您将学习如何创建深度遮罩、匹配焦点以及添加颗粒感。

本次工作坊要求学员具备 Nuke 的应用知识和一定的合成经验，但各个级别的艺术家都能从 Meliza 的见解和工作流程中获得灵感。

本次工作坊提供的项目文件包含 Meliza 的 Nuke 资源。此外，我们还提供了一份 PDF 文件，其中包含可直接从 Action VFX 下载资源的实用链接，方便希望使用本次工作坊中相同资源的学员使用。

软件：
Nuke

This advanced compositing workshop guides you through compositing a shot, from start to finish, following the principles that would be expected of you in a real VFX production setting. Over the course of 3.5 hours, you’ll comp a photorealistic VFX shot while learning helpings of tips and tricks from Meliza, a Senior/Lead Compositor and Lead Digital Matte Painter, including how to solve common compositing problems that even professionals run into when working in Nuke.

Meliza begins with a lesson in color space, explaining how to work in linear, without compromising an original log plate. You will then do a 3D camera track in Nuke, and use this information to build a 2.5D background. Meliza provides subscribers with a layered digital matte painting to use; she instructs how to project these layers into cards. Meliza also teaches the important keying techniques that she always uses in production and that have proven successful on even the most difficult green- and blue-screen shots.

Once the tracked background and keyed plate are done, Meliza shows how to add 2D elements from Action VFX to bring the environment to life. As the final step, you will learn how to create a depth matte, match focus, and add grain.

Working knowledge of Nuke and some experience in compositing is required for this workshop, though artists of all levels will find inspiration in Meliza’s insights and workflow.

Project files provided with this workshop include Meliza’s Nuke assets. A PDF containing useful links to download assets directly from Action VFX is also provided for those that want to utilize the same assets as featured in this workshop.

Software:
Nuke