2 rendering issues?
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@tomot said:
My primary rendering engine happens to be Vray, this also happens to be the V-Ray for SketchUp Forum
I don't know how your answer is supposed to help me with either of the 2 question I asked.Yeah, sorry for that, I wanted to give a hand but it was late last night
What I was asking was which indirect illumination metods you are using: irradiance map and light cache? Irradiance map and quasi montecarlo?
If you are using Irradiance map, try putting higher values in Hsph Subdivs and Interp. samples. Like if you have 30/10 then use a combination of 50/40 a nd see what you get.
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I recall Fernando answered a question at the chaosgroup forum about the mirror reflection issue. I think there's a checkbox in the reflection properties for the mirror. I'll see if I can find the info.
Increasing your Hsph. subdivs would be your best bet on the blotchiness. That and increase your lighting levels. (It's worse when lighting levels are low.) -
About the colours in the mirror, have you checked your facr normals?
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@thomthom said:
About the colours in the mirror, have you checked your facr normals?
correct! the face normals were reversed, my bad.
I fire up Vray once a month to see if it can still annoy me, and it still never lets me down.
So how do we deal with these ongoing rendering problems?
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so far, restarting sketchup (all open instances) has worked for me. It could also be a memory issue, but see if restarting works.
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@andybot said:
so far, restarting sketchup (all open instances) has worked for me. It could also be a memory issue, but see if restarting works.
are maybe there is still a memory leak! I have 8GB memory, running a quad core CPU, Win7
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Check the Task Manager to check for memory usage.
Remember vfsu runs inside su, which is 32bit. The very max it can use is 4gb. -
@thomthom said:
Check the Task Manager to check for memory usage.
Remember vfsu runs inside su, which is 32bit. The very max it can use is 4gb.I use 8gb mainly for Photoshop, I would hope I should not have to disable or remove my available Ram just for Vray.
I have found after 2 years of beta testing, its best to uninstall Vray when I'm not rendering inside SketchUp. Vray simply interferes too much with the normal operation of SketchUp, without Vray installed SketchUp almost never crashes.
I have upgraded several times my computer systems. I have 4 to chose 2 of which are netbooks. Without Vray, Sketchup loads almost instantly. My gut feeling after all this testing to date, Vray will never run successfully inside SketchUp, At the same time, I still hope my experience will be proven wrong. -
Hi tomot
For the "blotchs":
- Blotchs in renders: too few Hsph samples; loss of detail in shadows or "flying objects": too much Interp samples; find a balance between the two. Normally a relation Hsph 75-100 to Interp 15-25 it's works for most, but it depends on the scene.
Vray it's a very powerful and adaptable render, but the SK version it's a dumbed down version (and can be useless for print work due to memory limitation). If you have a access to 3DS max with vray use it, even if you don't know much about 3DS you can use it like a studio render program. Just open the SK file in 3DS (has to be sk version 7) and change the materials (the uvs are kept), and you'll have access to other things like vraydisplacement mod, vrayfur, vray pass, etc etc. Just be careful about imported SK meshs in 3DS because it can have some "quirks" like you can't put vrayfur on it and have to create that part of the model/face in 3DS to use it (at least in 2011 version).
Hope it helps
Best Regards
David
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@tomot said:
@thomthom said:
Check the Task Manager to check for memory usage.
Remember vfsu runs inside su, which is 32bit. The very max it can use is 4gb.I use 8gb mainly for Photoshop, I would hope I should not have to disable or remove my available Ram just for Vray.
I have found after 2 years of beta testing, its best to uninstall Vray when I'm not rendering inside SketchUp. Vray simply interferes too much with the normal operation of SketchUp, without Vray installed SketchUp almost never crashes.
I have upgraded several times my computer systems. I have 4 to chose 2 of which are netbooks. Without Vray, Sketchup loads almost instantly. My gut feeling after all this testing to date, Vray will never run successfully inside SketchUp, At the same time, I still hope my experience will be proven wrong.I also disable VfSU when I do not render - as I find it adds too much loading time and interferes with the undo stack. But I do not uninstall it. I disable it from under Extensions and then use my V-Ray Toys to load it on a per session basis.
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Tomot -
There are many examples of superb photorealistic renders from vray for sketchup. A lot depends on three things - lighting, correct rendering options setup, and good materials. In your image my specific comments:
lighting: add some spot lights to shine on your cabinetry, the main problem looks to be too low lighting
options: I'll pm you a visopt
materials - add some materials with reflectivity, bump maps, good seamless textures, etc to give your rendering a more realisitc feel.Andy
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@unknownuser said:
Vray it's a very powerful and adaptable render, but the SK version it's a dumbed down version
I hear these sentiments often on this forum and would have to disagree. Yes, you are limited by 32 bit memory and yes, there are some additional perks in 3ds Max, but the underlying algorithms in the engine are the same, regardless of platform. I would only have to steer you toward the work of Teofas, FreeAgent and others who have shown what Vray for SU can do in the right hands. I think there is a general assumption that somehow opening this same scene in Vray for Max will magically render perfect in situations where it's failing in sketchup. It's simply not true. I'm speaking as someone who spent the money based on this faulty assumption. I have learned to love and do prefer Vray for Max for a lot of reasons, but instant push button quality with little knowledge is not one of them.
Tomot, issues like that of the blotchy furniture could also be a material and /or lighting problem. Can you post the file to have others take a look?
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Hi EarthMover
I didn't say that to sound like an insult and my apologies if it sounded like.
What I meant was that everything that you do in VrayforSK can be done in VrayForMax, but the other way around it's not true. And if they both use, basically, the same "technical" language, IF YOU CAN, use the more complete version (unless you don't do big renders/complex scenes or don't need the other features missing)I never said nothing about "one-button-does-great-render" on Vray for max...I know there's great work done in Vfsk...as there's for Vfmax, maya, maxwell, mental etc. etc. they did the model, scenes and images not the software. And, if I may say, you should had try to inform yourself better before buying any software (marketing and other people's experience can be very misleading), because there's no rewards without study, patience and hard work in this area.
Best Regards
David
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I would take issue too with the "dumbed-down" comment. The vray engine is certainly hampered by sketchup's limitations, but it doesn't make vray itself watered down.
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No worries David. I was more or less just refuting a common sentiment that I hear often on the forum. I thought a lot of inexperienced users may misinterpret what you said. Vray revolutionized rendering solely because of the unique way Vlado performed his raytrace calculations and did it in an open framework. Not all that much has really changed from the initial version of Vray, way back when. Some things have been streamlined and different assets added, but at it's core engine, Vray is performing the same calculations, regardless of what software it is running within.
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V-Ray takes a lot more work to get right than other engines that does brute force rendering and therefore able to simplify the UI. However, I still use V-Ray despite it's a steeper learning curve because I can get some really low rendering times when I need to in order to meet the deadline.
Though, the current issues with the Rendering Spawner in VfSU makes it troublesome at times... The takeover by ChaosGroup disrupted a lot of ASGVis plans for VfR and VfSU. They where getting close to finish up the development of VfR and merge the development between the two products. But after they became ChaosGroup USA they had to add some more features to VfR in time for SIGGRAPH. So the VfSU development suffered a delay. But I'm looking forward to when they are back on track because VfR got some really cool things: Proxies!
and Light Domes so one can light a scene with HDRI and get sharp shadows. -
@thomthom said:
I disable it from under Extensions and then use my V-Ray Toys to load it on a per session basis.
thanks! tt I will investigate that
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@earthmover said:
Tomot, issues like that of the blotchy furniture could also be a material and /or lighting problem. Can you post the file to have others take a look?
Earthmover: Simply download any Kraftmaid kitchen cabinet, and see how it renders.
http://sketchup.google.com/3dwarehouse/details?mid=35c6699ccc9464a1c59350d819542ec7&ct=mdrm
interested it seeing your results! -
I don't think anyone here is trying to discredit Vray, although I have always felt a disconnect between the easy use of Sketchup versus the professional nature of Vray. Watching a superb 10 minute Video of how to create lighting for one living room lamp in Vray, does not inspire me to attempt to do the same to illuminate 20 other lights in a scene, including the time it takes to render unfavorable outcomes.
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