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EXT_mesh_features: Language and clarity updates (continued)#25

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ptrgags merged 2 commits intoCesiumGS:3d-tiles-nextfrom
donmccurdy:ext-feature-metadata-v2.9
Oct 11, 2021
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EXT_mesh_features: Language and clarity updates (continued)#25
ptrgags merged 2 commits intoCesiumGS:3d-tiles-nextfrom
donmccurdy:ext-feature-metadata-v2.9

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Continuation of #21.

This PR does not include any (intentional) technical changes, but does specify some restrictions that were probably intended but not previously explicit. I've updated terminology in the illustrations, but haven't altered illustrations much otherwise. I've tried to introduce concepts "in order", but early references to later topics are necessary in a few places and I've tried to include links accordingly.

Written descriptions of properties are not exhaustive — hopefully this is a good balance of providing enough detail without duplicating content from the Core Metadata specification. Each section now links to a schema file, which does include exhaustive property references.

Notable changes:
- Expand raster format description.
- Relax byte alignment requirements to match component size, not strictly 8-byte.
- Clarify that GPU instancing does not allow property textures at the node level.
@donmccurdy donmccurdy requested a review from ptrgags October 11, 2021 21:04
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ptrgags commented Oct 11, 2021

Looked over the changes as described in #21, looks good! thanks @donmccurdy!

@ptrgags ptrgags merged commit 9a25387 into CesiumGS:3d-tiles-next Oct 11, 2021
@donmccurdy donmccurdy deleted the ext-feature-metadata-v2.9 branch October 11, 2021 21:19
nithinp7 pushed a commit that referenced this pull request Feb 15, 2022
EXT_mesh_features: Language and clarity updates (continued)
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