point light

[lonewolf]

Here's a quick test render of a WIP lighthouse. I would like a point light at the top, but all TG has is a light source (sphere). Anyone know how I can change this?

Iain

[Oshyan]

TG's light source *is* a "point light". Just leave the Source Radius at 0 and increase strength to the desired level. However what you may want is a so-called "spot light". TG2 doesn't include such light source types, but you can model something with a spherical opening in it and put a Light Source inside it and that will basically do it.

- Oshyan

[lonewolf]

Thanks. Will give it a go.

Iain

[dhavalmistry]

please DO share the final.....

[lonewolf]

Haven't had much time to remodel the lighthouse, but here's a quick lightbox test I made up. The pictures are with light strength at 100 and 500. After that the box can't hold it in.

Iain[attachimg=#]

[old_blaggard]

Your box might be able to hold in the light better if you tried using raytracing in the atmosphere.  I'm not sure, though, and it will jack up render times.

[Mr_Lamppost]

I had a similar problem with light leaking through the top of the lantern on my lamppost 

http://forums.planetside.co.uk/index.php?topic=2259.0

I know I was using an extended light source so that I could cast soft shadows but don't remember any or the other settings.  I have another render on the go just now but will have a look when that has finished.

[j meyer]

I did several tests recently and the results suggest that there
is a light through issue similar to the sun through terrain bug,
which is well known.The light source shines easily through
double hull walls or whole models aswell.
I have to admit though that i haven't tested o-b's suggestion,
so maybe there's still a chance.Otherwise we will have to wait
until planetside can fix it.

[lonewolf]

Here is a modified lightbox with 3 wall layers and a protruding cone. light strength 500 and raytraced shadows turned on. took 5 times as long to render a quick test. so final render should take some time. fixes the problem though.
[attachimg=#]

[sonshine777]

It will be interesting to see if you get a volumetric beam when you put haze or low clouds in the scene. Looks good as far as the testing goes though.

[j meyer]

Did a few more tests yesterday.I used 2 spheres for this
and the atmo samples were set to 32,light strength was
2500 iirc.Have a look.
Hope you don't mind me posting it here.

[rcallicotte]

You mean enabled ray traced shadows?

[j meyer]

Aye.

[rcallicotte]

I'm going to want to try that for darker scenes to see what it does.  Thanks.  This is useful to understand.

[lonewolf]

Been working on my new lighthouse. This one has a hollow lightbox in the top for my pointlight to go in.
Initial render of the object tells me I have to work on the shaders a little, but most of the detail I wanted is there.
When I get it right, I will be making a day image and a night image.

Iain