Virtualight and Lightworks

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Virtualight and Lightworks // Tech Forum

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Post by dani100185 // Jan 19, 2009, 2:59am

dani100185
Total Posts: 5
Hello,i have 2 questions to witch i don't find the answer.

1.what is the difference betwin Virtualight and Lightworks because i don't seam to find one.

2.Where can i find V-Ray for TrueSpace 7.6,you don;t have it for sale any more on the site and i can't seem to find it on the web.

Thanks

Post by Nez // Jan 19, 2009, 3:07am

Nez
Total Posts: 1102
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1) the simplistic answer is that they are just different render engines, with different features - Lightworks has been part of tS for a while and supports a range of rendering features and materials, including volumetric effects, HDRI, layered textures and various others (but not GI). VirtuaLight is a different 'engine' which supports different features, including GI and caustics (I think - haven't actually used it so not 100% certain). I would think the manual would give more specific guidance on the differences.

2) unfortunately, you can't get VRay for Truespace at present - it may make a comeback at some point but not at the moment. Other render engines are also being explored - you'll see some other threads on this if you look around...

Post by Steinie // Jan 19, 2009, 3:10am

Steinie
Total Posts: 3667
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Lightworks HDRI and Multipass Rendering

Virtualight Caustics and GI


VRay ?

http://forums1.caligari.com/truespace/showpost.php?p=90949&postcount=49

Post by TomG // Jan 19, 2009, 4:52am

TomG
Total Posts: 3397
The main differences are as mentioned below :) In case you are unsure


GI = Global Illumination = the ability to bounce light around in a scene, so that light reflects off walls, carpets, people, etc. The default rendering for most engines is just plain raytracing, and this does NOT happen - light comes from the lightsource, to the surface, to the camera, and that's it, and does not bounce from one surface onto another. This means GI looks much more realistic and less "stark and cold" than regular raytracing. Virtualight offers this, Lightworks does not.


Caustics = reflection (or refraction) of light from light sources onto other surfaces. In regular raytracing, the view through a piece of glass, or in a mirror, is calculated, but not the way that light from lightsources distorts. With caustics, this is calculated, so mirrors reflect light onto surfaces, and glass objects focus light passing through them (think sunlight through a wine glass). Virtualight offers this, but Lightworks does not.



Both caustics and GI result in longer render times, due to the extra calculations involved.



HDRI = the ability to use an image that has more than the regular dynamic range to generate both light and background reflections. This lets you take either a normal photograph or image, or a high dynamic range one, and use it in your render to get simulation of the lighting effects of that environment, and also have that environment turn up in reflections and refractions (important for having those look real). Can also produce nice soft shadows, and so gives nice realism. Lightworks does have this. Can't recall if Virtualight does.


Multipass Rendering = ability to render different components from the scene to different Photoshop layers. Have different objects appear on different layers. Have specular results on one layer, diffuse results on another, reflections on another, etc. Allows for great control over an image in post process, eg adjust strength of reflections just by adjusting the opacity of the layer, rather than needing to go and re-render the whole image. Lightworks offers this, Virtualight does not.



Another difference is that the Lightworks settings and interface are easier to understand and get to grips with, while Virtualight will take some more learning. And if I remember, you can't do preview area renders using Virtualight (could be wrong there though - anyone?)


HTH!

Tom

Post by dani100185 // Jan 19, 2009, 5:41am

dani100185
Total Posts: 5
Thanks so much to all you are great help.

I hope the vray will be ready soon.....

All the best

Post by TomG // Jan 19, 2009, 6:01am

TomG
Total Posts: 3397
Hi Dan,


Unsure what you mean on V-Ray being ready soon - it has been removed from sale, and will not be available at least for the foreseeable future. We can't speculate long term, but it is not waiting on something to become available, but rather was available and has had to be removed with no current plan on it being available again.


Yafaray might be available soon, courtesy of the amazing work of third party developers. And Lightworks and Virtualight are both currently available and installed with tS. Other options exist, with less degree of integration though, such as Kerkythea and Indigo.


HTH!

Tom

Post by frootee // Jan 19, 2009, 6:03am

frootee
Total Posts: 2667
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Hi dani.

Vray won't be available.

At some point in time it may be offered, but currently there are no plans for it.


Regarding Lightworks, it can be called from the Workspace side now; please refer to this thread to download the node:


http://forums1.caligari.com/truespace/showthread.php?t=7633


Applying lightworks textures must still be performed on the Model side.


EDIT:

I wrote a little model side plugin which calls the LW renderer; it too can be accessed from Workspace side, but I have to put it

together into a usable package. All the parts are there; I'm currently working on a related item though.


It will be interesting to see if VirtuaLight can be accessed in a similar fashion.
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