@mitcorb said: Up till reading this thread my understanding of index of refraction was that this is a factor of how light is bent while passing through a relatively dense transparent material and would not necessarily affect reflectance correct It's affecting how much reflection you'll see when you are parallel vs perpendicular to the reflective surface. The illustration was just to indicate that when you're standing on the side of a mirror/glass, the reflected image doesn't reflect what is perpendicular to the mirror/glass.

Thanks!

Thanks!

Your second image looks like your exposure is about right - it looks like you just need to work on your quality settings. For a lot of reflected light, I find DMC and Light Cache gives me the smoothest image. There are a variety of visopt settings you can try at asgvis downloads for final render quality. The one tip I found useful is to set the color threshold very low in "Image Sampler" to .01 or .005 for the final image (as long as your computer is up to the task... it can take really long on a slow machine.)

i know this might sound silly, maybe it is, since im not having this new version of vray.. but have you tried to copy your scene to a new file then try to render again? goodluck,

or start with this address: http://forum.asgvis.com/index.php?board=15.0 goodluck,

Effectively neat presentation

Hi, thanks for the help! But I still have some trouble with my grass materials. I use the Grass Plane.vismat material that I have downloaded from the ASGVIS homepage. Please have a look at the attached image. I can't see any bump and the grass looks so small?! I have tried to increase the texture inside Sketcup paintbucket by editing the texture to 2 x 2 meters, but it looks very unrealistic to me in the render. Is there any other options that I have missed that I can change in the materials properties to get a more realistic grass? Is there any better method to create grass instead of using a texture like this? Is there better grass materials to dowmnload somewhere else? Preciate som help? Thanks! [image: VQru_forum1.jpg]

Remember that you also need to adjust the camera exposure, as you would in the real world. If you only adjust the intensity of the light sources you often end up with burned out areas. I find that the VfSU default is set up for exterior, so when I do interior shots I need to adjust the exposure.

this just happened to me as well. the solution is to click 'include frame number' under the output tab

Here's a scene I was testing some night lighting with. I used an invisible rectangle light in the windows and an omni in the box. Night lighting depends on a lot of things....render settings, glass material settings, light settings. Check some of my settings in the scene and see if that helps. Turn up the intensity of the window lights to get a brighter cast outside. The outer plane is to get cast on the wall and needs to have "affect reflection" turned off. You can do without the outer plane, but the wall will be totally dark. Also check the "shadow settings" in Sketchup. [image: 0xOT_vraynighttest.jpg] vray night test scene.skp

I don't remember all the details of displacement now. I'd suggest you set up some small test cases to see. But I don't think you can have different material on different sides of the face. certainly not different displacements. Face normals matters greatly with displacement. (how the faces are oriented. You should verify that all your face normals are oriented properly - the front (default SU colour white) should be pointing outwards.) In general you should always have full control over your face normals, especially when rendering. Now and then, switch the SU style to display the faces in SU's default colours, you might even set the backside colour to a bright colour to make it easier to spot faces oriented incorrectly.

oh my! u r super good! thanks alot!

i know how to overcome this prob.. u juz save the file after u set all the colour n materials. then off the file.. n then open it back.. then u start render using vray. it works for me since i faced the same problem as well bfore.. give it a try.. n good luck!

Guys, I'm creating a library with .IES lighting files for vray 1.48. They are available at: http://cid-b15d752486d2e557.skydrive.live.com/redir.aspx?resid=B15D752486D2E557!886&authkey=plYvz2uEXnQ%24 For each file I'm creating a preview. For each IES there will be a JPG file, which will demonstrate the effect of light. the number between brackets in the filename represents the power of the light used in vray [image: ColorBlast6_clear%20%5B15.000%5D.jpg?psid=1] [image: ColorBlast6%20%5B15.000%5D.jpg?psid=1] good work!

The latest public version is currently 1.48.89. While is has been a rebuild to make it OSX compatible it's never been refereed to as v2. @dverger said: http://forum.asgvis.com/index.php?topic=2320.0 It works on 1.05 but not on 1.48 No - it's broken.

Yea, you don't normally get sharp shadows with HDRIs. I think I've heard of people who made a blend map for the GI and made a mix with the HDRI and Sun/Sky...

V-Ray doesn't make use of the SketchUp shadow toggle. You mush go to VfSU's Option window and under the Environment section remove the Sun/Sky maps.

@tomsdesk said: Try setting the image transparency to 98%...sure helps my tree png's. Thanks to you both. Tom - im at work so I dont have access to my programs. By transparancy do you mean adjusting it within the transparancy option thats next to the diffuse option within the materials editor in Vray? ie sliding it from white into the black by 2%?

that was totally what i want thanks a lot