v ray direct light?

[burr_cg]

hi all

sorry maybe it is a great incapability of understanding of me but i cannot place a simple direct light...actually the problem is that there is only two lights in the plug-in which are rectengular and omni, and i know that i can use sketchup sun (i have seen people speaking about vray sun but i dont know how to activate it), upto this point there are no problems...but i just tried to follow some v-ray tutorails, and i am always stuck when it says "now place the direct light", that is why i cannot simply create sun rays going into the room, or making shadow of it. after some trials i have seen that rectangular light was used in some examples for sunlight entering through windows, but cant i have a direct light as just vray tutorials ask me to put: (http://lakehao.home.comcast.net/tutorials/15.JPG)
now i am trying to make sun from rectangular light by unchecking "ignore light normals" to have something like direct light but it is hard to adjust the way and direction of light with that, and when sun needs to be far away from window...thanks in advance

[dalomar_cg]

Re: v ray direct light?

Currently there are no direct lights in VfSU. Joe would be the specific one to ask about why we don't have one. The Sketchup sun can be activated as the v-ray sun by having default lights checked in Global switches and having the sky texture mapped to GI and Background. The closest thing your really going to be able to use is a very small rec light, and you will actually want to have Ignore Light Normals unchecked so that the rays are primarily traced in the direction you have the rec light orientated. Also most direct lights don't have any decay (light intensity decreasing the farther the object is away from the light) associated with them, so leave No Decay enable to have this effect (it should be on by default). Hope this helps

[burr_cg]

Re: v ray direct light?

thanks for the concern...and yes in the end i have used a rec light for sun, it works but only it is hard to adjust the direction since there is no way to see the projection cone of rays. but all in all it is ok, i have a satisfactory render now thanks...

[Free Agent_cg]

Re: v ray direct light?

Hey thought this was a good thread to ask about the sun in...
can anyone tell me why the sun sometimes works with the "overide suns parameters" checked
but then other times that seems to make sun points straight down where unchecking overide suns parameters will fix that?

hope someone understands that... :-[

[dalomar_cg]

Re: v ray direct light?

yea thats a bug that joe is working on. The quick fix is to save your settings and then reload them. Don't know why that is, but thats the work around.

[djereminov]

Re: v ray direct light?

Hi, i just wonder of how to ad vray sun to sketchup. I have seen in manual a tab within a model info properties witg geographic locations and other things and manual says that it should be activated throughout command line, i dont seem to have any of above mantioned options or either the command line.
I have latest Sketchup an v-ray for it, trial version.
I dont have same problem with rhino but most render jobs i started to do in sketchup.
Thank you in advance

I did it with only default light and shodows checked, but there is no option of hoe to refine shaodows, and there is no location tab in model info.

[Gorlak_cg]

Re: v ray direct light?

I too would be very interested in an explanation of the section that mentions 'command line'. I can get to Model Location as shown in the manual, but i don't know how 'to add a V-Ray sun type Sunlight into the command line' as mentioned on p78 of the manual.

[dalomar_cg]

Re: v ray direct light?

There are apparently a few things that were written in the Rhino of the book that did not get changed for the SketchUp version, and that whole line is something for Rhino(there is no command line in SketchUp). Sorry about that :-[

As for adding the SU sun, its all controlled through the typical SU controls. All you will need to do is enable Default Lights in Global Switches