Marc Albrecht


About Me



My Tutorials

obj-image Quick Tips
Quicktip: Tearing Cloth Setup
obj-image Quick Tips
Using the Treeview for Rigging
obj-image Beginner
Walkthrough: Cloth Sim for a Movie Shot
obj-image Quick Tips
Getting Weightmaps into H16
obj-image Quick Tips
Wind for Cloth Sims in H16
obj-image Quick Tips
Adding a Flipbook Framecounter

Recent Forum Posts

Very slow Dec. 12, 2017, 10:35 a.m.


like cpb says, a HIP file for experimentation always is a good idea.

> every time I move the curve it takes a long time to recalculate

… you might consider caching the state of your procedural construction and only recook on the click of a button - have a read on caching results, file caches etc. Because if you *do* recook upon on every input change, you will always run into user experience issues.
Sometimes it makes sense to use proxy geometry / simplified representations for setup purpose and have a switch somewhere that applies what you created with the proxies to the actual “render” geometry. This is more “UXP design” than “procedural thinking”, but with a fully procedural workflow you have to consider both.

On Mantra rendering and speeding it up there are some discussions around here, some tutorials and even one or two masterclasses. In the end, if you want “really fast rendering”, you may have to consider a second render system to accompany Mantra and use each based on its respective strengths.

Sorry, no silver bullet in today's deals, but maybe this helps anyway.


Very slow Dec. 12, 2017, 3:16 a.m.


could you be a tad more specific about what you mean by “slow”? My wife uses her brain, legs and hand and, at times, is very slow, too. I am quite sure *that* is a configuration problem on her side, yet she keeps insisting it's all my fault.

What are you trying to do? Are you experiencing slowdowns in moving geometry around (H isn't the fastest here) or are you talking about simulations? What kind of simulations? Are you sure you optimized your sim settings? Are you talking about rendering? Mantra isn't “fast” but has some (volumetric-related) advantages fast renderers don't offer out of the box.
If your system is not using SSD but mechanical drives, that might be something to look into (in general anyway ) …

There might be settings to tweak, too, but it really depends on what you are experimenting with and what exactly “slow” is for you.


Blow up/growing FEM Dec. 4, 2017, 2:59 a.m.


you can use a target geometry (which might be the original one you are starting with, doing a pre-roll simulation to deflate it first) and either increase the target strength over time (which may look unnatural - or in other terms “exactly like the director wants it to look”). Or you can increase the bending resistance over time to get a more believable behavior (simulating increasing pressure inside the object).


(Cloth course for different solver types in the works)