{"action":"created","issue":{"url":"https://api.github.com/repos/KhronosGroup/glTF/issues/699","repository_url":"https://api.github.com/repos/KhronosGroup/glTF","labels_url":"https://api.github.com/repos/KhronosGroup/glTF/issues/699/labels{/name}","comments_url":"https://api.github.com/repos/KhronosGroup/glTF/issues/699/comments","events_url":"https://api.github.com/repos/KhronosGroup/glTF/issues/699/events","html_url":"https://github.com/KhronosGroup/glTF/issues/699","id":173442085,"number":699,"title":"[PBR extension] Additional maps (normal maps, displacement, ...?)","user":{"login":"mlimper","id":1853237,"avatar_url":"https://avatars.githubusercontent.com/u/1853237?v=3","gravatar_id":"","url":"https://api.github.com/users/mlimper","html_url":"https://github.com/mlimper","followers_url":"https://api.github.com/users/mlimper/followers","following_url":"https://api.github.com/users/mlimper/following{/other_user}","gists_url":"https://api.github.com/users/mlimper/gists{/gist_id}","starred_url":"https://api.github.com/users/mlimper/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mlimper/subscriptions","organizations_url":"https://api.github.com/users/mlimper/orgs","repos_url":"https://api.github.com/users/mlimper/repos","events_url":"https://api.github.com/users/mlimper/events{/privacy}","received_events_url":"https://api.github.com/users/mlimper/received_events","type":"User","site_admin":false},"labels":[{"id":431586985,"url":"https://api.github.com/repos/KhronosGroup/glTF/labels/PBR","name":"PBR","color":"e99695","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":19,"created_at":"2016-08-26T12:29:16Z","updated_at":"2017-01-04T10:40:13Z","closed_at":null,"body":"We need to check if / how bump maps / normal maps could be integrated.\n"},"comment":{"url":"https://api.github.com/repos/KhronosGroup/glTF/issues/comments/270342401","html_url":"https://github.com/KhronosGroup/glTF/issues/699#issuecomment-270342401","issue_url":"https://api.github.com/repos/KhronosGroup/glTF/issues/699","id":270342401,"user":{"login":"mlimper","id":1853237,"avatar_url":"https://avatars.githubusercontent.com/u/1853237?v=3","gravatar_id":"","url":"https://api.github.com/users/mlimper","html_url":"https://github.com/mlimper","followers_url":"https://api.github.com/users/mlimper/followers","following_url":"https://api.github.com/users/mlimper/following{/other_user}","gists_url":"https://api.github.com/users/mlimper/gists{/gist_id}","starred_url":"https://api.github.com/users/mlimper/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mlimper/subscriptions","organizations_url":"https://api.github.com/users/mlimper/orgs","repos_url":"https://api.github.com/users/mlimper/repos","events_url":"https://api.github.com/users/mlimper/events{/privacy}","received_events_url":"https://api.github.com/users/mlimper/received_events","type":"User","site_admin":false},"created_at":"2017-01-04T10:40:13Z","updated_at":"2017-01-04T10:40:13Z","body":"Well, usually we will try to keep the spec really limited to the parts that are absolutely necessary, to keep the burden on a spec-conformant implementation as low as possible.\r\n\r\nIn this specific case, it might be OK to have an F0 texture for the dielectric materials as an optional component, since it seems that - even if an implementation would ignore that one - the rendered results wouldn't look too different.\r\n\r\nJust to be clear - that optional texture would only be used to read the F0 values for the non-metallic parts, correct? For the metallic parts, we would still use the base color map."}}
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