Thanks Dingobruce !!!
Your solution seems to work
The only problem is it increases the rendering time a lot... But that's anyway better than when I used VRay lights to make the LEDs dots

Thanks for your help, and have a very good day.
Cheers mate.

Hello my friends.

I have a question : I had a glimpse of something in a tutorial that could help me a lot, but I can't find the proper tool to make it happen... (and I of course lost the tutorial link...)
Maybe one of you have the solution ?

I want to be able to :

1. Make my scene.
2. Render it.
3. Adjust the light (for exemple, but I could also adjust or change a material).
4. Go back in the frame buffer (i hadn't closed it).
5. select a part of the window space only.
6. render this window part only to make the comparison with the former rendering in the same workspace.

I'm pretty sure this is feasible, but...

By the way, I have a Sketchup Pro 7 and a VRay 01.5.30. Maybe my wish can only come true on the last VRay versions ?

Many thanks in advance !!!
Cheers.

Hello my friends.
I need your help.
I've been struggling for monthes with a problem concerning emissive materials.
Maybe one of you geniuses have the solution :
I'm trying to make some LEDs.
To do them, I use an emissive material.
But when I try to have them displaying a great amount of light, here is the result (whatever camera type I use : standard or physical) :

I so don't know what to do anymore... Apart from maybe eating my hat in anger and frustration...
Help anyone ?
By the way, I have another question for the light specialists : if you place some LEDs against the edge of a glass (or PMMA) plate, this light will go through the plate bumping internally on the main faces. It will then come out through the other edges, lighting them (especially if they are frosted). I'm trying to make this happen through VRay without success... Is it a problem or IOR ?
Thanks a lot advance !!!

Just found the solution !!!
Here is the way to make this work fine :
Complete procedure :

• Modeling the LCD screen.
• Creating a VRay material in the VRay material editor window.
• Putting a bitmap type in the "m" box next to the DIFFUSE layer color.
• Attaching a bitmap file in the "m" box in the appearing menu.
• Applying the changes.
• Closing the VRay material box.
• Back in SU window, press "B" to open the SU material window.
• Select and apply the material on the proper face of the LCD screen.
• Position/scale it correctly on the face by right clicking on the face, then selecting texture, position...
• Then back in the VRay material editor window.
• Adding an emissive layer to the VRay material we created.
• Putting a bitmap type in the "m" box next to the EMISSIVE layer color.
• Attaching a bitmap file in the "m" box in the appearing menu (the same one as in the diffuse color).
• Applying the changes.
• Closing the VRay material box.
• Rendering.

Tadaaaaahhh !!!! It works !!!!
Cheers.

I now understand I made a mistake and mixed things.
In my mind, the default VRay shaders did work the same way than jpg images you apply to emissive VRay materials... And it's not the case.
I indeed can position/scale the default VRay shaders directly from SU (my mistake).
But I still have the problem for the emissive materials (when I want to make a lit up LCD screen, for example).
Complete procedure :

• Modeling the LCD screen.
• Creating a VRay material. Adding an emissive layer to it.
• Putting a bitmap type in the "m" box next to the emissive layer color.
• Attaching a bitmap file in the "m" box in the appearing menu.
• Applying the changes and closing the VRay material box.
• Applying the shader on the proper face of the LCD screen.
• Rendering.
  -> The shader appears repeated in the "tile" option is checked.
  -> the shader appears white if the "tile" option is not checked.

Help ?

I'm sorry, but unless I don't see what you're speaking about, I think you misunderstood what I said : I'm not triying to scale/position mapped textures (jpeg images imported or linked to a newly created SU material). I'm trying to use the small VRay textures library provided with the VRay software itself. Inside this library, I for example have a "brushed metal", or some woods, which I think use an image as a base for texturing. And these textures don't seem to work : their scale seems to be so reduced when applied that the wood stains, for example, simply disappear (too tiny).
Same thing is you want to create a screen : I create a new VRay material, I add an emissive layer to this material to make it glow, and then I want to attach it a jpg to have the image appearing on the screen. Two option then :

• Either the "tile" button is checked and the jpg appears tiny and repeated many times on my screen.
• Or I uncheck the "tile" button, and the jpg simply disappears from the face I'm working on. I think that's because the jpg's position/size/origin is out of the face and probably far away.

Any idea about how to solve this fu..ing situation ? I've been jumping a while already of rage and despair trying to fix this.

Many thanks !!!

By the way : I'm on Sketchup 7 and I don't use a physical camera
Cheers.

Hello gents.

I had a look to your discussion 'cause I happen to have the same problem...
And I didn't find the answer to my problem nowhere... Neither in the manual, nor here (maybe I didn't look properly).
The problem stays even when exploding the groups. To be honest, I think this scaling/position problem appears with all the textures proposed by default with VRay (metal, wood, ...) All the linked images appear tiny, and their position is random. That's why they don't appear anymore if "tile is unchecked" (their position simply is far away out of the face I want to texturize). And I really don't know how to position/scale a texture if it's not a mapped one...

Hopefully, you found a solution to your problem, so... Any help ?

Many thanks in advance for whatever piece of advice you bring in.
Cheers.