Modeller Crashing with Subpatch

[gordonrobb]

I was wondering if anyone could help with this problem.

I am using Lightwave 9.6 and have been since it was in beta. Having no problems with it.

I noticed last night as I was working on a model that has a fairly high poly count as in in subD.

It has pillers that are around 9K polies and there are 18 of them. If I press tab modeller crashes. If I set the subpatch level to 2, it works fine. I loaded a model that I build a while ago with high poly and subpatch, and it crashes on loading. I have tried it on 9.6 and 9.6, both 32 and 64. I have ditched the cfgs and nothing makes any difference. I have an ATI radion 4870, and my machine is i7 940 with 8Gigs (so its not a spec problem).

can anyone suggest anything?

[Sensei]

I would try:
- using Sub-Patches instead of Catmull-Clark Sub-D (or vice versa).
- splitting object to multiple layers.
- checking whether problem is in Layout too (Modeler's sub-patch level is just for your eyes after all).
- using Legacy OpenGL.
- upgrading/downgrading gfx driver.

If you're using CC:
2 level -> 9K * 18=162,000 polys * 2 ^2 * 2^2= 2.6 mln polys..
3 level-> 162,000 polys * 2 ^3 * 2^3= 10.3 mln polys..

If you're using Sub-Patches:
2 level -> 9K * 18=162,000 polys * 2 * 2= 0.65 mln polys..
3 level-> 162,000 polys * 3 * 3= 1.5 mln polys..

[gordonrobb]

Done all of that and have narrowed it down.

It woulb apear to be a problem with OpenGl and my ATi card. If I switch to legacy OGL, works fine (but slower), if I switch to Streaming same thing. If I have it in buffered it crashes.

It was always only modeller though. Going to install an old Geforce I have, just to test it out.

Edit: Just checked and Layout was in Streaming, when I put it in bufferd it also crashes.

[Lewis]

Gordon, what OpenGL mode you use ? GLSLS or Multishader ??

[gordonrobb]

Multi shader.

I have swapped out my card, and put in my old Geforce. Problem gone. Will need to see about getting a more upto date geforce but at least I'm back to modelling.

[Lewis]

Ahh so it's old same story with ATI :(. I've dropped ATI after 5 months playing and testing various drivers in LW 6.5-7 era and i always had some issues with OGL. since then I'm keeping myself on Nvidia camp :).

Good to hear you solved it at least for now.