OpenSubdiv and Games

bugo

Anyone know of a project that is using this in realtime already? I wonder why this is not spreading out as much as it should.

JamesTKirk

I believe it's much better performance-wise to have traditional model with LODs than to rely on OpenSubdiv tesselation. You can make a very detailed retopology and it will still have much less triangles than smoothed OpenSubdiv. I can think of a few cases where it can be useful but generally It's a waste of GPU power.

leleuxart

Wasn't CoD: Ghosts using something like that?

bugo

From the info and videos I watched, it's impressive that the cost is not as bad, it's why I thought it would still be uesful.

Count Vertsalot

We'll get there eventually. I fully expect opensubdiv and displacement maps to replace what we use now some day. I think the next big technology push will be in dynamic light rendering though.

meshiah

leleuxart
i just worked with the guy that made the in game subdivision pilot helmet from that cod demo a while back, if you're referring to that.
he said it was a pain in the ass and took forever so set up so the uv's didn't break when it divided. dealing with uvs on sub-d geo isn't the funnest to begin with.
wish i had more info, he's not here anymore, but if were chatting ill ask about it.

and yea i hope count vertsalot is right, better lighting (and alpha for fuck sake) is really needed. pbr is getting all the hype right now, hopefully that shifts into the tech needed to support pbr better.

[Deleted User]

Cinebox uses SDS.

jamesjogi08

Performance-wise to have traditional model with LODs than to rely on OpenSubdiv tesselation....!!!

Chris Krüger

I believe Headus uv layout have a couple of good functions for unwrapping subd surfaces.