[Bf-funboard] disable only heavy undo

[Roland Hess]

Seconded. I know that when working with BlenderPeople, the Undo has  
to be disabled during the process of walkcycle generation. Even with  
only 1000 Actors, the RAM the Undo eats quickly goes through the  
roof. I'm not sure if it would be better to have a switch as  
suggested "Regular Undo" vs. "Max Memory Undo", or a simple settable  
RAM limit per undo push. Before the push, it checks if the chunk it's  
going to cache is bigger than the limit. If it's not, no problem. If  
it is, perhaps even warn on the first occurrence: "OK? Big Undo That  
Use Lots of RAM". Clicking okay disables the RAM limit for the rest  
of the Blender session. Canceling away from that dialogue sets the  
limit.

> From: "Tom M" <letterrip at gmail.com>
>
> it would be nice to have the ability to enable a 'light undo' ie only
> do undo pushes for things that will not take a lot of ram.
>
> The scenario I desire this for is that if i'm sculpting on a 4 million
> polygon mesh - the ram required to store undo pushes for hiding part
> of the mesh is enough to crash blender (ie i end up exceeding the 2 GB
> limit for a process - actually the first hide works, the second hide
> is what results in crashes for this specific scenario), however i
> would like to keep undo pushes available for the sculpts that i do,
> which don't take up much ram.
>
> LetterRip
>

Roland Hess
harkyman