clipmap?

[Gijs]

Since black in opacityslot does not render completely invisble (it becomes visible at intense lit area's) I am wondering why Vray does not support clipmaps. I searched the forum, but couldn't find a wish about clipmaps, which supprizes me with the large amount of people doing archviz. Or do you guys have a workaround. I read about the displacement trick, but they don't work on proxies, and it seems quite inefficient to create additional geometry (@rendertime) for this.

[DanielBrew]

Hi Gijs,

Have you tried turning off the fake highlights in the VRay material. I seem to remember from my scanline days having a similar problem with Max standard material. On a standard material you still get highlights where the material is totally transparent, I think the workaround was to copy the opacity map into the specular level slot as well.

Dan

[percydaman]

i remember personally asking for clipmaps. only makes sense to me with a raytracer.

[DaForce]

You can kind of bodge up your own clip map using vraydisplacement and its water level. So you displace by say 2 pixels and set the water level to 1 pixel, this will cut off all the mesh that isnt displaced and therefore clipping via you map

[Gijs]

Re: clipmap?

Daforce, I'll quote myself

I read about the displacement trick, but they don't work on proxies, and it seems quite inefficient to create additional geometry (@rendertime) for this

[DaForce]

DOH!!!

hahah thats what you get for skim reading a post while your tired.


Well another option is to boolean out the leaves by using max displace then a quick boolean or 2 then just use one leaf and replace the opacity mapped leaves.
So basically you would end up with a thin box or plane that is shaped just like your leaf.

[themaxxer]

hi all

do you mean the problem like this?
the opacitymap is illuminated by the lights, this is wrong!



it would be great to get a map like clipmap, wich is only for cut out a map with an alpha channel.

best regards
themaxxer