<div dir="ltr"><div dir="ltr"><span id="gmail-docs-internal-guid-8fac2939-7fff-38e0-02bf-0620bd65ede0" style="color:rgb(0,0,0)"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Hi team</span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Recently the topic of which license to use has come up again. In particular whether or not we should be moving towards GPLv3. As far as I understand GPLv3 is compatible with the same licenses that GPLv2 is, in terms of what code (and thus engines) we can integrate, but it is in addition compatible with GPLv3. </span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br><br></span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://www.gnu.org/licenses/gpl-faq.html#AllCompatibility" style="text-decoration:none"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;text-decoration:underline;text-decoration-skip:none;vertical-align:baseline;white-space:pre-wrap">https://www.gnu.org/licenses/gpl-faq.html#AllCompatibility</span></a><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> gives a quick idea of how that works out.</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">So the net gain for us, is that we would be able to integrate code that is itself licensed under GPLv3, one _potential_ example would be for instance the HPL engine: </span><a href="https://github.com/FrictionalGames/HPL1Engine" style="text-decoration:none"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;text-decoration:underline;text-decoration-skip:none;vertical-align:baseline;white-space:pre-wrap">https://github.com/FrictionalGames/HPL1Engine</span></a></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Technically we can perform this change because we are licensed under “GPLv2 (or later)”, which means that we can transition to v3 without having to seek new approval from all historical contributors. (The linux kernel is a counter example, where they lack the “or later”, and would thus need to seek explicit permission from all contributors, as the license they got the code under does not allow for upgrades).</span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br><br></span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Since this is a fairly large, and completely irreversible change, so we’d like to hear what the opinions are among the team, should we stay at v2, or move to v3?</span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Regards</span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-ligatures:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The leadership team</span></p><br></span></div></div>