GPv3: Automatic conversion from GPv2 #118320
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Reference: blender/blender#118320
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In order to better test compatibility between GPv2 and GPv3, automatic conversion should be added.
For now, this should only be done in case the experimental option (
U.experimental.use_grease_pencil_version3) is enabled.Conversion
OB_GPENCIL_LEGACY->OB_GREASE_PENCILob.greasepencil_modifiers->ob.modifiers)b31e6bd93e)e850cca0a7)bke::greasepencil::convert::legacy_gpencil_to_grease_pencil8bca19ed12)Warning
Am not sure I agree with this tbh.
Am also not sure we want to enable automatic conversion by default (once GPv3 gets out of experimental), as long as both GPs coexist. INHO, automatic conversion should only be enabled once original data is fully removed from Blender (besides what is required to perform the conversion of course). At least, that's how we handled the move from proxies to liboverrides:
If we follow the current rules for breaking changes (See point 2 in forward compatibility section), complete removal (and enforced auto-conversion) of old GP should happen in 5.0 release.
Once GPv3 lands in a release, it should replace GPv2 completely and become "Grease Pencil". There was an agreement that having both grease pencil versions in a release is a no-go.
Generally, I do agree with this, but talking to @Sergey and @brecht then consensus was that it's fine as long as we make users aware of course.