Light settings

Hi All,

I'm trying too render a scene of a class room with the sun light and interior light setting but when I render this only the sun light setting is working and no lights!

Could someone please let me know what I am doing wrong?

Thanks

Fred

▶ Reply to This

Replies to This Discussion

Permalink Reply by Boothy on October 14, 2010 at 2:42pm

Hi Fred

Do mean they are only working in render or in lighting channels - can you post a image - could do with a little more detail to analyse problem If it is in lighting channels - you must remember to set the appropriate number of channels in setup dialog and also remember to apply a lighting channel number to the light fittings when you create them in SU

Cheers

Boothy

▶ Reply

Permalink Reply by Rich Hart on October 14, 2010 at 2:53pm

Perhaps you chose the "Exterior" preset, to tun on the Sun, which turns off Artifical lights. In that case you need to check the box "Enable Artificial Lighting", or use the "Int w/sun" preset.

Perhaps the Sun Intensity, on the Options/Sky tab, is set so high that it overpowers the lights.

You could turn on a few lighting channels and then try lowering the Sun and Sky channels, and increasing the other channels, to see if the lights appear.

Also, you could right click on the Render menu bar and Select "Statistics", to get a list of the setting that you're using, and post the first few sections here. Then we could see what settings you really are using, how many lights are in the drawing, etc.

For example my settings are:

IRender nXt
Version: JI28nxt
14:47:35, Thursday, October 14, 2010
Untitled
Resolution: 600 x 457

Extraction Time: 0.0 seconds
Loading Time: 0.0 seconds
Render Time: 32.6 seconds
Passes: 20

Meshes: 29
Faces: 705
Materials: 10
Lights: 1
Glow Lights: 0
ArPlants: 0
RPCs: 0

Engine: nXt Basic

Sun and Sky:
IndirectLightingOn: 1: (Standard)
NumIndirectBounces: 1
MonteCarloReflectionsOn: 0
LuminairesOn: 1
SoftShadowsOn: 0
ShadowsOff: 0
RefractiveBounces: 6
ReflectiveBounces: 3
LightsPerPass: 5
SkyType: 1 (Analytical)
SkySaturation: 0
HdrFilename: rnl_probe.hdr
HdrRotation: 0.00
SunOn: 1
SkyOn: 1
SkyStudioOn: 0
SkyVisibilityOn: 1
SkyReflectedOn: 1
GetAutoDaylightPortalsOn: 1
SUN: Cloudiness: 0.2
SUN: Intensity: 0.8
SUN: Highlight: 0.9
SkyIntensity: 0.319999993
HdrIntensity: 1

Lighting Channels
NumLightingChannels: 5
SunChannel: 0
SkyChannel: 1
GlowChannel: 4
LightChannels:
channel: 2 lights: 1
Channel Intensities:
CH: 0 0.0000
CH: 1 1.0000
CH: 2 52.0000
CH: 3 1.0000
CH: 4 1.0000

Custom background
CustomVisibleSkyOn: 0
CustomReflectedSkyOn: 0: Default (Use Lighting Settings)
CustomRefractedSkyOn: 0: Default (Use Visible)

AmbientType: 2: Medium - Interior
AmbientMultiplier: 1

etc.

▶ Reply

Permalink Reply by fred henaux on October 14, 2010 at 3:05pm

Hi Boothy/Rich,

I'm pretty sure I have the correct settings "on the tabs". I've not set any lighting channels thou! only the preset channels.

I've uploaded the model so you can have a look to see what I mean. Sure I'm doing something wrong!!!

Thanks for your help.

FRed

Attachments:

Hurstpierpoint Ped.skp, 19.4 MB

▶ Reply

Permalink Reply by Boothy on October 14, 2010 at 3:29pm

Hi fred

When I look at this model with zoom extents it appears like this - is it supposed to be like this ? the light are clearly not in line with rest of interior - please advise

Boothy

▶ Reply

Permalink Reply by Render Plus on October 14, 2010 at 3:44pm

I am taking a look at the model.

I will render it with lighting channels in case that is part of the problem or provides a clue.

▶ Reply

Permalink Reply by Render Plus on October 14, 2010 at 3:53pm

It is probably not related, but you are running version JI28. You probably want to update to JJ06.

▶ Reply

Permalink Reply by Render Plus on October 14, 2010 at 4:41pm

I rendered the model, with the latest version, and it looked like this:

Then I used lighting channels to turn the sun and sky all the way off.
(To make sure interior lights were working.)

The I made the sun and sky dim, and the interior lights brighter to get this.

Lighting channels makes this type of balancing easier. You can also do this by increasing the intensity of the lights and re-rendering.

▶ Reply

Permalink Reply by Render Plus on October 14, 2010 at 5:00pm

I did get the same strange unzoom as Boothy, so one reason the sun may too bright is that the room is rotated to she sun and sky are coming in the windows as if they were the ceiling.

▶ Reply

Permalink Reply by fred henaux on October 15, 2010 at 1:17am

Hi Al / Boothy,

The model is like it is because I was playing around with the lights! The actual room has a new ceiling I was playing around with. It sounds like I have the incorrect settings then in the lighting channels!
Al's 3rd render is roughly what I'm trying to achieve, abit of sun light and some artificial lighting.

Boothy seems to have it spot on with the interior renders I've seen that he's done. Hats off to you.

Thanks for all the help again by the way.

Fred

▶ Reply

Permalink Reply by Boothy on October 15, 2010 at 7:05am

Hi Fred

I have attached a recessed light fitting I use it might help - if you drag onto a face and explode it should automatically `cut away` ceiling (this makes life a little easier - also all sub groups \faces\edges are set not to create shadows which will also make a cleaner scene. One thing to really watch with recessed lights is the baffles can create a lot of relective artifacts so therefore be generous with the`no source light refelctions in your materials

Boothy

Attachments:

flou ceiling recessed 600 no shadow 100 deg.zip, 22 KB

▶ Reply

Permalink Reply by Boothy on October 15, 2010 at 12:52pm

Fred

In your model the other `tube lights in adjacent group could affect your interior scene - would be best to place on hidden layer for tests
Your light sources also seem to be applied glow\light to materials - I have found that creating a specific NXT lighting element and inserting into model will be more effective (see sample attachment in post above)
Boothy

▶ Reply

Permalink Reply by fred henaux on October 15, 2010 at 1:38pm

Hi Boothy,

Thanks for the attachment and also for your help.
On the attached image you posted showing the settings you apply for light sources how did you get up the task bar which shows shadows setting on? is that through NXT? Thought that was only used via sketchup!

You also mention the following:I have found that creating a specific NXT lighting element, do you mean creating an object and applying a glow setting to it?

So sorry but I'm still fairly new to this really!

Thanks again Boothy.

Fred