Light Rays going through windows technique?
squirt
Posts: 170
Does anyone here know how to make light rays shine through a window with several paynes in it?
Would really appreciate the technical assistance. :)
Post edited by squirt on
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Iray or 3Delight? This is usually called god-rays, or crepuscular rays - there are several discussions on the topic, the methods do vary by render engine.
Sickleyield has a really good tutorial on it. It worked for me and was pretty easy to follow. RawArt3d has a preset camera for it, but I haven't tried it.
Sickleyield also has Simple Godrays in the store, I haven't tried it.
These are all Iray. I don't know about 3delight.
https://www.daz3d.com/epic-props-godrays-volumetric-light-for-iray
If you were to use the Sickleyield Godray product with iray, what shader/material would you need to convert his prop to?
Or...Uber...or what?
Is that even possible?
Not sure but Marshian and Sickleyield teamed up to make an Iray version that is on sale today. It comes with planets and fractals too, and SY made a youtube tutorial on the product page.
Wow! Thanks a lot folks! I'm using Iray of course so I'll check out the Sickelyield for sure!
Thanks again you all!
Wow, I can't find Squirt softdrink nowhere in the local area anymore.
The first question is, can you dit in in post work? If the answer is yes, that is the easiest. It would be a matter of adding a layer, then use a white paint brush to size then adust the transparentcy.
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I did a quick and dirty experiment where I created a cone, put a yellow collor in the "Emission Color" panel, changed the Luminance to 100 with units cd/cm2 and turned down opacity to 0.05. That gave a result but it was omidirectional with light cast in all directions (light shouldnt look like it's hitting behind the god light I think) so I plugged in a free IBL emission profile of a flood light in to make the light cast only in the direction of the angle of the light. I also played with putting a cloud image in the opacity strength but that seems to have done nothing. Anyway I got the image below. The light itself is grainy, that's a good thing for a godray in my opinion, implies dust and stuff. The edges are too sharp (that's why I tried the cloud) but it give a quick and easy distance solution anyway and it renders pretty fast, faster than some of the better looking solutions anyway, so there's that.
EDIT: I also had to turn two-sided light to ON so that the object inside the god light was illuminated.
for fun I added a bloom filter and played around to get it to sort of blur the edges of my cone in render, also to make the item being illuminated pop. Got this result by adding bloom.
Dreamlight did an add-on light set for Jack Tomalin's original version of Baroque Grandeur, lo, these several years ago. It includes a bunch of flat pane props for godrays to come through those windows. I'm still using them. Getting them scaled and positioned is a bitch, but they work very nicely in a 3DL render.
They're rather like Jepe's flat plane special effects packages.
I tend to agree with beyonder2k9. You can do some amazing stuff using a "postwork" software, in real time, even animating, without rendering.
Here's an example of some amazing light rays thru smoke, done in real time using the free software called "Nuke". At least I think it's free.
https://www.youtube.com/watch?v=thXx_LNlPSU