Getting ready to pull the trigger on the bundle, just curious as to the differences from 13 to 15(?); going through the materials Ari Danesh did for SideFX there have definitely been changes to shortcuts and context behaviors which made it a bit hard to follow, can I expect the same fron vols. 1-4?
For 14, a lot of it was dynamics (crowd system, PDB grain solver), some improved uv tools, and improvements to component selections.
For 15, a new shader (the principled shader) was added. They made a big change to the ForEach system (but the old one still works), added viscous fluids sytem, and some small changes to the FLIP solver.
In general, SideFX usually makes a lot of changes with every update. (I think they have redone their cloth solver 4 times in the last few years). In terms of my tutorials, I think anything you see in the helloluxx tutorials (which I started with version 13) should translate up to version 15, with only small differences.
Technical Repository 
Getting ready to pull the trigger on the bundle, just curious as to the differences from 13 to 15(?); going through the materials Ari Danesh did for SideFX there have definitely been changes to shortcuts and context behaviors which made it a bit hard to follow, can I expect the same fron vols. 1-4?
For all the info, I’d check the official help docs’ “What’s new” sections:
http://www.sidefx.com/docs/houdini14.0/news/14/
http://www.sidefx.com/docs/houdini15.0/news/15/_index
For 14, a lot of it was dynamics (crowd system, PDB grain solver), some improved uv tools, and improvements to component selections.
For 15, a new shader (the principled shader) was added. They made a big change to the ForEach system (but the old one still works), added viscous fluids sytem, and some small changes to the FLIP solver.
In general, SideFX usually makes a lot of changes with every update. (I think they have redone their cloth solver 4 times in the last few years). In terms of my tutorials, I think anything you see in the helloluxx tutorials (which I started with version 13) should translate up to version 15, with only small differences.