volumetric light

[bpzen]

Can / will the plug in support volumetric lighting?

Has anyone got guidence on how to achive it, I am trying to get sun beams into a room using an emitter prop with an IES filter. The forums seem to have one vuage thread on Shlick setting ? what ever that is

thanks

[face_off]

Yes - this is supported. There are a few tutorials here in the forum. In summary, load a Poser primitive box into the scene and enlarge it to cover the entire area that will have the sunbeams. Then setup the material for that box as a Specular material, with SSS (scatter = white, absorption = black, Schlink = 0). Use a small scale to start with (0.01 for example). The camera must be outside this box. Unsure if the lights need to be outside the box or not.

Suggest getting this working on a blank test scene first, since it can take some tweaking to get right. Remember to use PT or PMC kernel. Remember to put a Transmission on your box material of white (to get the SSS working). Reduce hotpixel_removal to clean the render up.

Paul

[bpzen]

Thansk Paul ill give this a try today

Co0uple questions, I cant find teh tutorials on this effect would you ahve a link?

Also, is that an IES light to get the cone effect? I assume yes, without IES I find emitters splash all over?

[Erick]

I recently had the similar idea of trying out volum. light.
Here're 2 pics (reduced and all that) I came up with.
Not quite perfect, I know, but I got the idea, of how things work =)

I found this tutorial very helpful.
http://youtu.be/MqOZp77ZSLg

In summary it "just" tells and shows you the things, Paul already mentioned =)

[Erick]

What I also found is, that it was and still is incredible hard (well, for me at least), to find a good light balance of interior and ex. light from and with the sun. Took me quite a few runs.

[samhal]

Way cool! I'll be experimenting with this tonight!! Thanks guys!

[bpzen]

Looks like exactly what im trying to do, did you use sunlight for outside light or HDRI?

I strugle a lot with indoor lights and the mesh over running (ligth goes all over the place) the rooms. IES Helps some but still a struggle

[Erick]

I know, you're asking about using IES or an emitter, but you're right, I used sunlight, for my renders.
I have yet to try this with IES tho =) .. I have to admit, so far I didn't have much luck with IES driven renders.
May it have been extreme noise, the positioning of the "light cone" .. etc ... yea .. still trying and learning ... trial and error, so to say

[face_off]

Erick - outstanding render!

[bpzen]

Hey Paul i tried yoru set up and my box is black? Any thing I may be missing ? Casuing that