adjusting C4D Hair applied to Generator Objects while using IPR causes C4D to crash

[marlena_ratajska]

Hi there!
I'm using Vray5 + R21 and trying to create grass using C4D Hair applied to the standard Landscape generator, but every time I'm ajusting Hair Count and Hair Material parameters while having IPR open - C4D crashes. I've tried it with other generetor geometries (Plane with Displacement, Platonic object, Bezier, Plane with Fields, sweeped or lofted surfaces etc.) and the result is always the same - crash. The solution I found is to bake the base geometry (i.e. make it editable or current state to object). All mentioned above geometries are working correctly with Hair after making them editable. There're just few "buts": IPR need to be turn off in a moment of applying hair, and Hair Object should be applied with preselected geometry, so that the Guide Link is automatically established and not added or changed after creating a Hair Object. When I use this method to apply Hair and then turn on IPR everything is working fluently and all further adjsutments of materials or Hair Count aren't causing any problems anymore.

Maybe I'm doing something wrong. I would appriciete any advice how to keep my base geometry parametric without baking it, or making it editable.

Many Thanks,
Mara

[shaio]

Hi,
Thank you for the feedback!
I've forwarded this to our devs to check the log. Often times trying to recreate the same steps or scenes doesn't really work for us to reproduce the crash or issue. Can you please share your scene with us, so we can check what could be causing the crash?

[marlena_ratajska]

Hi, in the attached file in the moment of replacing Polygon Landscape Object with standard Landscape Object in the Hair Guides Link, and then with open IPR adjusting anything like hair thickness in the Hair Material, Hair Count or Hair Clone Count, the whole application freezes. The same adjustments applied to the landscape as converted mesh object and open IPR are not causing any trouble. The same behavior will appear with use of any generator base geometry as I mentioned in my previous post: baked or converted polygon geometry is working, standard editable generators are crashing.

[felix_brner]

Hi,

I have the same problem as well. When I change the hair count multiple times or change the shape of the hair - all on a mesh with an aditional displacer applied - C4D just hangs for ever with a mouswheel spinning and CPU load at 99,9% all the time. If the deformed mesh is "made editable", and then the hair is added, V-Ray is much more robust and applies the changes immedietely.