oh hi, if you scroll up and find the image with red circles and numbers that i posted, then i found what number 2 is - it's apparently called a 'terminator problem' and a description of it could be found for example in this blender change-log (with images). for those interested, the more technical view is in this PDF, which is also cited in that blender article. the most detailed description i could find was in the Thea forums in this thread (with images). so, since sketchup doesn't have Subdivision modifiers (only SDS plugins, which however are a) paid and b) create solid hi-poly geometry), this is apparently an issue of shader coding and the solution lies on the shoulders of the developers... ping, dkendig? EDIT: and another technical PDF with the description of the problem (and apparently some solution, too)

Cheers again

Thanks, I'll try that technique for sure.

it's a bug. Happens to everyone. The only solution currently is to open the files with vray disabled in SU and do your copy and pasting then.

I stay very clear of Match Photo if I am using V-Ray. It is not reliable and is plagued with issues.

@pololo said: but, it will be awesome to have a shadow matte in vray sketchup. There are some Shadow channels - you even see one of them in the screenshot. Don't remember what the various do though.

Here is the trick// http://www.sketchupvrayresources.blogspot.com/2012/02/tutorial-2-point-perspective-rendering.html

gabbyquan, did you find a solution? if I save in .EXR, open in photoshop, adjust the gamma correction with Exposure, looks quite ok

So ... you're batlling a bug with another bug? Jokes aside, have any of you reverted to an earlier version? Which one would you recommend?

doesn't VRay for MAx use newer core? EDIT: also, yeah, if you could post a side-by-side comparison (with rendertimes), that would be awesome.

@damaiyanto said: but then if it is the light cache , does it mean there's no hope for using it? If you figure out which materials are slowing it down, you could try adjusting those problem materials (fewer subdivisions, use bump instead of displacement, etc.) then try LC again.

Some times I reduce the amount to 0.4 or 0.6 - depending on model. Rarely need to increase it. Might adjust the radius as well on occasion.

Cool, didn't know that. I do know rendering without an AA filter and sharpening in post is supposedly less accurate than rendering using a filter. I'm sure that's correct, but I've not noticed any adverse effects myself.

First of all, update your V-Ray to 1.49.01 there are many important bug fixes. Secondly, V-Ray doesn't render lines. If you need them you need to export a image from SketchUp with just the lines and overlay them in PhotoShop.

i think photomatch was done as reference and then the model has been remodeled and rendered completely.. the after image is completely different from before. they are completely diofferent but the good thing is they are using the same camera view. so photomatch is the answer.

Hello, probably because those materials were made for older versions of VRayForSU...

could it be resolved by turning on or switching the type of the antialiasing filter in Image Sampler?

There's quite a number of things that could be the problem. Since you say the image came out dark, my guess would be that the irrmap file you have and the view you are trying to render don't match. Try saving your irradiance map from the scene you are trying to render. If you are loading from another machine or from another scene, you may have issues using a saved map.