Function of Dynamic Memory Limit

[pradipta]

Hi guys,

 

I was experimenting with the Dynamic Memory Limit for an animation render, and increasing to 2048 mb did a trick to speed up the animation. the default is always at 400 mb, though.

 

I would like to know exactly how does Dynamic Memory Limit work and what its relation with the Default Geometry setting.

 

Thanks in advance

[BrianKitts]

always try a search....

 

http://www.cgarchitect.com/vb/28065-out-mem-solution.html

 

Although I must say the fact that it sped up your render is beyond my knowledge of switching from static to dynamic, my understanding is that normally it will slightly increase rendering time.

[Dave Buchhofer]

It really depends on the balance between how much dynamic geometry you have in the scene (Displacement/Proxy's/Hair/Etc..) and whether its doing heavy swapping on that portion of the scene with the default settings.. If so then you *could* concievably get a speedup by increasing the available memory for the dynamics.. but at the expense of memory for the static geometry Its one of those arcane ones where its only really useful for certain types of scenes and for troubleshooting.

[Roodogg]

Just found rendering with a certain amount of displacement (In the vray material slot rather than a vraydisplacement modifier), my light-cache prepass was taking aaaaages. (unloading geometry). This then had ramifications on both the irr maps processing and the rendering (unacceptably slow).

 

I am running a 3930k with 16Gb Ram so thought this was just not good enough! Boosted the dynamic memory limit x2 to 800 and it solved the problem... No unloading... the light cache, irr map and render flew by

 

Thanks for the heads up on that guys