TomasEsperanza Posted December 19, 2014 Share Posted December 19, 2014 (edited) The splotchiness in the mirrors looks like a GI issue to me. I am perplexed though; why does it appear only in the Mirrors? The GI settings were pretty high; Light Cache: High 2000+, Irradiance Map: 200 I'm thinking it's to do with the mirror material perhaps? Does it need a higher "Max depth" value? Or perhaps there are not enough photons from the light sources in the scene? Anyone who can save doing loads of test renders on this is a star! ps: just noticed it's actually very evident on the reflection of the vase too. Edited December 19, 2014 by TomasEsperanza Link to comment Share on other sites More sharing options...
himanshuchoudhary Posted December 19, 2014 Share Posted December 19, 2014 Could you pelase post some screen shots of the render and material settings? Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 19, 2014 Author Share Posted December 19, 2014 Urggg I could.... but tbh , I was just hoping someone will recognise the phenomenon and say " ah yeah - it's this...". I could troubleshoot it, but if the symptom is obvious enough to someone who knows this one "off the bat", that'd be great for next time. This one is out the door now. Cheers Link to comment Share on other sites More sharing options...
Tommy L Posted December 19, 2014 Share Posted December 19, 2014 try raising the reflection subdivs value from default 8 to about 24. Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 19, 2014 Author Share Posted December 19, 2014 try raising the reflection subdivs value from default 8 to about 24. Yup - reflect subdivs were at 64, (with glossiness at 0.99). The fill lights (a V-RaySun through the door opening, and a dome light with an hdri) had subdivs at 512. The Global Subdiv Multipler was at 4. But those spotlights are plain Max lights and they provide most of the illumination, (do they do photon emissions?) Perhaps the problem was with the dark scene? Link to comment Share on other sites More sharing options...
Tommy L Posted December 19, 2014 Share Posted December 19, 2014 If you have your render elements passes you can easily troubleshoot from there, you can isolate whether its lighting, reflections, GI, whatever. Link to comment Share on other sites More sharing options...
jamesdowling Posted December 19, 2014 Share Posted December 19, 2014 Are you using vray 3? I'm using 2.4 so the settings might be different but it looks like a GI problem. Light cache seems low to me, my animation low res preview setting is at 250. Try bumping it up to 500 and see if it makes any difference. Also I'm not sure where your getting the 2500 from on your irradiance map? Again it might be the new version is different. Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 19, 2014 Author Share Posted December 19, 2014 Doh.. of course. Thanks Tom. Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 19, 2014 Author Share Posted December 19, 2014 (edited) Are you using vray 3? I'm using 2.4 so the settings might be different but it looks like a GI problem. Light cache seems low to me, my animation low res preview setting is at 250. Try bumping it up to 500 and see if it makes any difference. Also I'm not sure where your getting the 2500 from on your irradiance map? Again it might be the new version is different. Nah, soz mate I'm just chattin shit - I meant the other way around. Yeah 2.4 also. (Lol those would be crap settings!) ..Still maybe because it's a dark enclosed space it does need even more GI.... Edited December 19, 2014 by TomasEsperanza Link to comment Share on other sites More sharing options...
jamesdowling Posted December 19, 2014 Share Posted December 19, 2014 lol no worries. I would put it down to not getting enough light into the corners behind the camera. you could make a vray skylight portal in the door to chuck a bit more in, or maybe on your spotlights extend the falloff field to get more light into those back corners... Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 19, 2014 Author Share Posted December 19, 2014 lol no worries. I would put it down to not getting enough light into the corners behind the camera. you could make a vray skylight portal in the door to chuck a bit more in, or maybe on your spotlights extend the falloff field to get more light into those back corners... Thanks James, that sounds like good advice. Link to comment Share on other sites More sharing options...
rahuljagde Posted December 26, 2014 Share Posted December 26, 2014 Easy juz add sum more lights in d scene either it is plan window light aur door light.. juz dnt increase the Gi value .. all uh have to do is increase bounces in the scene .. may be the default value is 100.. jz try to increase dat value to 150. N main thing juz check ur unit setup coz dis is more important for the light in vray aur what ever engine uh using for rendering.. Link to comment Share on other sites More sharing options...
Nic H Posted December 26, 2014 Share Posted December 26, 2014 do you have lightcache retrace threshold turned on? i think that will fix it Link to comment Share on other sites More sharing options...
Ernest Burden III Posted December 26, 2014 Share Posted December 26, 2014 I don't think this is as simple as GI settings because it is only seen in reflections. And what you are seeing is not 'poor sample blending' it is the samples themselves. It's pre-pass stuff. WTF? I did an animation a few years ago where That happened. It was a nice piece, except that issue ruins it for me. But it was a super-fast competition type project, so just getting anything to show was enough. Asking about this on the Vray for Cinema4D forum didn't get me anywhere. Pointing out any issue with vray usually results in "well you obviously have wrong settings, your cucumber weight is all wrong and you need more walrus belching and clearly that will solve the samples/bias/multiplier/whatever". Then they suggest BruteForce. https://vimeo.com/64253956 Link to comment Share on other sites More sharing options...
Ernest Burden III Posted December 26, 2014 Share Posted December 26, 2014 I looked it up, this was the only direct answer to why my reflections were showing GI samples. Note that this was four years ago, things have changed in vray since: the reflections is most likely that you had on LC glossy interpolation, but a very low lc setting. its a usefull tool for stills, better dont use that for animation also. Stefan Laub of vray4c4d The thing is I was pre-caching the LC of an IR/LC camera animation. Link to comment Share on other sites More sharing options...
Francisco Penaloza Posted December 26, 2014 Share Posted December 26, 2014 To me this is low Gi values, if you notice in all the other elements in the scene there is barely any shadow contact, and I am not suggesting to add AO but maybe detail enhancement. Those artifacts are typical of to much interpolation or samples to far from each other. as mentioned by Ernest, turn of LC glossy interpolation, reduce your LC radius and increase samples, and use Irr Medium or High. Increase the number of samples also may help. Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 26, 2014 Author Share Posted December 26, 2014 Good tips guys. Can't wait to try this out after the hols. We'll have this case cracked soon ! Link to comment Share on other sites More sharing options...
heni30 Posted December 26, 2014 Share Posted December 26, 2014 Want to post a stripped down version of the file? One strange thing I've noticed is when I have an unruly ceiling all I have to do is hit it with a plane light pointing straight up and artifacts go away. Link to comment Share on other sites More sharing options...
Ernest Burden III Posted December 26, 2014 Share Posted December 26, 2014 Good tips guys. Can't wait to try this out after the hols. We'll have this case cracked soon ! Maybe I will try re-rendering a frame from that animation with the new vray. Then, if the problem persists, I can increase the pickle angle and try re-unbalancing the interoperator set, maybe try BruteForce. Link to comment Share on other sites More sharing options...
Nic H Posted December 27, 2014 Share Posted December 27, 2014 TBF i reckon its case of Tommy not knowing his cucumbers from his zucchinis. Link to comment Share on other sites More sharing options...
TomasEsperanza Posted December 27, 2014 Author Share Posted December 27, 2014 "If it's still too funky, take the Frankenzoid Bopulater threshold to a sub-zero setting. -0.000000000000002 will reset your rst gizmo orientation." Link to comment Share on other sites More sharing options...
karthiksn Posted January 5, 2015 Share Posted January 5, 2015 Please make override materiel for black materiel and try and check ir setting Link to comment Share on other sites More sharing options...
TomasEsperanza Posted January 5, 2015 Author Share Posted January 5, 2015 Please make override materiel for black materiel and try and check ir setting Hi Karthiksn Interesting suggestion. What would one be looking for in the IR settings?, and how does a black override material facilitate this? Can you elaborate please? Link to comment Share on other sites More sharing options...
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