Indigo v1.0.2

[WytRaven]

um...no to that one too.

[Big Fan]

guess you can expect to be slapped around some then

[WytRaven]

Life is all about give and take

[Big Fan]

right then givers ...
now I have been trying to raise these conical dust lines and I cant seem to get them to show
in this doodle (which I have downsized here - hence the jaggies) I expected to create cones as I sketched in here in white for each light...
there are obviously IES cones made intersecting on the orange wall but no dust effect in the atmosphere
so I ask again if this is possible or am I just not doing this well - incorrect settings/ situation

[WytRaven]

Yeah you won't see the light cones in open space without a dusty atmosphere.

[Big Fan]

well there is a dusty atmosphere made there just as if I was making a dust for the sun to show..
perhaps the lights are too dim or small or the edge indistinct in comparison to the sun or something

[WytRaven]

Ah sorry I miss-read what you said. I would guess you just need to crank the scattering up a notch or three until they start to show up.

Here's an example known working dusty atmosphere material to check yours against in case there is actually something mis-configured in the mat (expects realistic scene scale):

Code: Select all

	<medium>
		<name>Atmosphere</name>
		<precedence>2</precedence>
		<basic>
			<ior>1</ior>
			<cauchy_b_coeff>0</cauchy_b_coeff>
			<absorption_coefficient_spectrum>
				<rgb>
					<rgb>0 0 0</rgb>
					<gamma>2.2</gamma>

				</rgb>
			</absorption_coefficient_spectrum>
			<subsurface_scattering>
				<scattering_coefficient_spectrum>
					<uniform>
						<value>0.05</value>
					</uniform>
				</scattering_coefficient_spectrum>
				<phase_function>
					<uniform/>
				</phase_function>
			</subsurface_scattering>
		</basic>
	</medium>
	<material>
		<name>Atmosphere</name>
		<specular>
			<transparent>true</transparent>
			<internal_medium_name>Atmosphere</internal_medium_name>
		</specular>
	</material>

Hope that helps

[Big Fan]

ok found it
dust box normals pointing the wrong way
not quite the conical shapes I imagined though...maybe its not right..need to check that next

[Anthony]

Maybe the material is scattering too much?

[Kram1032]

either that, or you used a pretty much uniform IES.... or...


I can see the shape of your fog-cube, due to scattering...
try to scale it up, 10 times (The camera isn't even in the fog, here, is it?)

[Big Fan]

yes it is

I am very busy lately I'll get back to this during the week

[Kram1032]

ok, strange...

Uhm, do you use Indigo 1.0.2?
try .3

But ok, both are close to similar, I guess...

[Big Fan]

yay found time this evening..
and got it functioning partly my script fault
made the lamp meshes a little bigger too..
for posterity this its an sss value of 0.01 which is a little strong I think
0.0075 would be better
the obvious thing is I think that despite the uniformly smoky atmosphere the light follows the ies distribution so there is no scattering for the first 300mm or so - at least with this pfofile -which is somewhat wrong I think
I wonder too about having no real way to control the light output other than making somewhat crude adjustments with with camera exposure etc...
anyway thanks for the assistance

[BbB]

You might just have to let this render for a lot longer. Things will start to take shape after a while.

[Kram1032]

IES more or less already have efficiency output given in their Data. Ono didn't add a multiplier, yet.
There's nothing, at the beginning, because the beam is very small, there, and you only would see it, if it'd be brighter