Penumbra Overture to be open source

[Thomas]

All will part of the open source package, however: HplHelper.exe and ParticleEditor.exe are in C#, so those would need some serious porting (rewriting more like it) to work with Linux / Mac.

Half-good news is that Amnesia will come with a particle editor that use the same format as HPL1 (penumbra) which will work for linux and mac too! The stuff that HplHelper does are fairly easy to do with text edit.