{"id":402,"date":"2017-10-02T18:13:49","date_gmt":"2017-10-02T23:13:49","guid":{"rendered":"http:\/\/ciraldo.stream\/uwm-vfx2\/?page_id=402"},"modified":"2017-10-30T15:18:20","modified_gmt":"2017-10-30T20:18:20","slug":"sky-replacement","status":"publish","type":"page","link":"https:\/\/ciraldo.stream\/uwm-vfx2\/topics\/sky-replacement\/","title":{"rendered":"Sky Replacement"},"content":{"rendered":"

Sky Replacement<\/h1>\n

[ Lecture Notes<\/a> ] [ Lab<\/a> ] [ Homework<\/a> ]<\/h5>\n

OVERVIEW<\/h4>\n

Sometimes it is useful to know how to replace or augment the sky<\/strong> in our footage. For example, you can change the weather, turn a gray sky to cloudy blue, change the time of day, add sci-fi moons, eclipses, etc.<\/p>\n

Very generally, “sky replacement” involves
\n (a)\u00a0matching one or more new sky layers to the motion of the original footage<\/strong>,
\n (b) performing masking so that the new sky doesn’t overlap the ground<\/strong>, and
\n (c)\u00a0color correction to match everything up<\/strong>.<\/p>\n

“Keying” and “Track Matte”<\/strong>\u00a0\u00a0
\n If you can easily separate the original sky from the ground with keying tools<\/strong>(e.g., Keylight, Luma Key, Extract, etc)\u00a0then you can use the silhouette<\/strong> of either the ground or sky<\/strong> for masking other layers. In After Effects this is called using a\u00a0Track Matte.<\/strong><\/p>\n

In simpler shots you can use simple mask shape animation to separate the sky from the ground. Sometimes basic 2D motion tracking is all that’s needed.<\/p>\n

1. Removing The Original Sky<\/h2>\n

Masking<\/h3>\n

Keying<\/h3>\n

Track Matte<\/h3>\n

2. Tracking The Motion Of The Original Shot<\/h2>\n

Basic 2D Tracking<\/h3>\n

3D Camera Tracking<\/h3>\n

 <\/p>\n

3. Color Correction<\/h2>\n

Levels effect<\/h3>\n

Curves effect<\/h3>\n

Hue\/Saturation<\/h3>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Sky Replacement [ Lecture Notes ] [ Lab ] [ Homework ] OVERVIEW Sometimes it is useful to know how to replace or augment the sky in our footage. For example, you can change the weather, turn a gray sky to cloudy blue, change the time of day, add sci-fi moons, eclipses, etc. Very generally, … <\/p>\n

Continue reading “Sky Replacement”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":71,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-402","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/pages\/402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/comments?post=402"}],"version-history":[{"count":11,"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/pages\/402\/revisions"}],"predecessor-version":[{"id":551,"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/pages\/402\/revisions\/551"}],"up":[{"embeddable":true,"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/pages\/71"}],"wp:attachment":[{"href":"https:\/\/ciraldo.stream\/uwm-vfx2\/wp-json\/wp\/v2\/media?parent=402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}