I forget which page but in the HAnim pt 1 spec, there is mention of “n/2 radians” with no description of n. Thanks I’ll create a spec feedback one I get the section -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20200403/afd8dce1/attachment.html>