halo rays

[ehsan_wwe]

i have a question
whats way for making halo in vray
[attachment=0:2nxbia4a]holotest.rar[/attachment:2nxbia4a]
at this sample i test it on blender default render engine

[Hugh]

Re: halo rays

What do you mean?
1 - Lens glares?
2 - Streaks of light in the air? (sun beams/godrays)
3 - Light in volumes? (like spotlights in the dark)

As far as I remember, each is done via:
1 - Compositor nodes (fairly easy).
2 - Involves render setup and composition (a little tricky).
3 - Fog gizmos and light setups (a bit slow).

I guess you mean volumetric light. It is not so hard work to setup:
- Set the gizmo and tweak the density and distance (usually very low).
- Add the light (I first experimented with spot light), and face it towards the gizmo. You will have to tweak the light strength to get the desired effect.
You can experiment in a dark environment so you can see the effects of your setup easier.
(Remember to render GI)

[ehsan_wwe]

Re: halo rays

hello hughs
thanks alot for helping
i cant finde tweak and density
but i was too happy for can render volumetric light

[Hugh]

Re: halo rays

Yes, you got the concept.

What I mean with gizmos and densities was this:

You used full environment fog for rendering. Sometimes this approach is not the best (particularly closed scenes). For example, if you are rendering a room, or an alley (or anything confined) it is best to use a gizmo, which is a mesh that serves as the fog space.

For example:
1) Add a mesh. Scale it to be big enough to appreciate the effect.
2) Go to Scene > Effects > Fog.
3) In the "Objects" option, select your mesh. Remember to put a light inside the mesh space.
4) Render. Play with the Color, Density and Distance of the fog. Render again. Repeat until you get the desired effect.

Enable GI for best results.
Happy experimenting.

Sorry for not including Pics...

[ehsan_wwe]

Re: halo rays

Yes, you got the concept.

What I mean with gizmos and densities was this:

You used full environment fog for rendering. Sometimes this approach is not the best (particularly closed scenes). For example, if you are rendering a room, or an alley (or anything confined) it is best to use a gizmo, which is a mesh that serves as the fog space.

For example:
1) Add a mesh. Scale it to be big enough to appreciate the effect.
2) Go to Scene > Effects > Fog.
3) In the "Objects" option, select your mesh. Remember to put a light inside the mesh space.
4) Render. Play with the Color, Density and Distance of the fog. Render again. Repeat until you get the desired effect.

Enable GI for best results.
Happy experimenting.

Sorry for not including Pics...

thanks hugh to helping
i try it at first free time ><
you says mean when i select a box for fog object evrything is in the box are in the fog ?
or fog particle size equal to object selected by me

[Hugh]

Re: halo rays

Yes, the box (or whatever mesh you use) will serve as the fog space. Only the volume of that mesh will be computed as Fog.