Hi PPGiorgio,
A number of things can result in the light not being emitted.
I have a couple of suggestions that you can try.

1. Kindly move the rectangular light a little bit away from the object that is supposed to be the light source e.g bulb , and see if you can see the light is emitting.
2. Sometimes you might have to double click the rectangular light and perform a "reverse face" with your right-click context menu to get the white side of the face drawn,i.e the light to face downwards so that you can see the light.
   3.just make sure the rectangular light is not on a layer you have probably turn off ,and also if you have scenes setup for your render ,please update them before you do another test render
   4.rectangular light is not difficult to setup ,to see a sample setup go to http://help.chaosgroup.com/ .
   5.Screen capture your rectangular light settings and paste it here so that the gurus on this platform can help

I will choose sketch-up any day,why choose a complicated software like 3ds max to do something that a simple software can do.The first time i saw the interface for sketchup I was very impressed with it as well as the ease of use, so I started using.
Now following several forum with people singing praises to 3ds max I decided to take a look at it.A colleague opened it on his laptop and guess what?the interface is boring and looked complicated as others have mentioned.
I think sketchup has made 3d modelling very easy for newbies and some people are not exactly happy about it so they will tell you sketchup is amateurish,I strongly disagree.
Besides is not always about the instrument ,is about the person who wields it.

When creating lets say a proxy tree, is there a way by which I can create a vismat file to go with my Vrmesh file so that when I import my Vrmesh back to skecthup,I can equally go to the Material Editor and Import my Vismat file (containing material information for leaves,bark etc..) so that the proxy IDs get updated with the material required automatically.

@toxicvoxel
How long does it take to receive the product license,I have placed the order and have been waiting for days now for license.Any explanation will be much appreciated

THANK YOU PAUL.Am truly grateful

Thanks a lot .
I as was saying a,I can use the Draw metal plugins however it creates so many faces for the spiral thereby increasing my file size big. how do I address that?

Can anyone write or suggest a link on how to model these wrought iron shapes for gates and balustrades in sketch up.
I experimented with Draw metal, I am able to use fairly,when i create the spiral with curve maker and taper maker my model file size increase astronomically,even though I use 12 sides for the cross section it stills ends given my model a big file size and then slows it down.

I want to know if the sketch up native tools can do the wrought iron shape or there is an alternative plugin I can use.

I want to able to trace the curve from a photo and model to get my spirals.
Attached below is what I intend to replicate in sketchup

Hi everybody,
As part of the measures to reduce the polygon count of our sketchup models,i will like to know that:Supposing I have created a cylinder or any tube-like shape into a component for my model,
Is there a way to reduce the polygon count of that component,without necessarily drawing it again.
Assuming I used 24 sides for the cross-sectional area of the component,Is there a way of automatically reducing that cross-sectional area to say 12 or 8 sides so that I wouldn't have to draw it over again
Thanks

I think a lot has been said already on how to reduce the poly-count of a model.
1.using a lower size eg.sides 12,sides 8 when drawing a circle or arc
2,Using components(especially for windows ,doors etc that repeat quite often if you are modelling a building.
3,Importing models with small polycount especially trees.Using trees with very high detail will slow your computer down considerably.You may want to use trees that are "face-me component instead.
4.If I have to use a texture image bigger than 1MB,I first open it up in Microsoft picture manager or paint , reduce the pixel size and save it as a Jpeg File.An Image file of 5MB can yield 602kB through this process.You can now use the Image with its reduced file size on your model thereby reducing your polycount.
5.You shouldn't also forget to purge your model of unwanted/unused materials and component

Hi Guys,
I have found an easier ways to trace my cad files in sketchup before before extruding them for my drawing.Maybe some of you may know it but I thought Is worth sharing anyway.

Other videos tutorials on YouTube and other blogs tell u to import the Cad file to sketchup,move all the layers to the "O" layer ,create a new layer call CAD,create two scenes 1.CADON,2.CADOFF ,block the imported CAD files and start tracing.Depending on the size of your plan u could spend 30 minutes to an hour tracing.It works pretty well but there is a quicker way to trace the drawing.

Here is what to do.
First in In Autocad put off the Dimensions of the plan and any other blocks like beds ,furniture etc and save the file with a new name to keep the original file.
1.Now import the new file into sketchup.
2.Bring the drawing closer to the origin of sketchup.
3.Toggle the view of sketchup to "Top" on the views Tab.
4.Using the pencil or rectangle and starting from the origin create a face bigger then your plan.
5.Move your plan and superimpose it on the rectangular face created,select the plan and the face and run the "Intersect with model" from your right click menu.
6.When the intersection is done use,Use Outliner to select your cad file and move it away from the face.
7.Voila! Your floor plan would have been fully traced onto the face ready for extruding