Ardak Posted March 21, 2011 Share Posted March 21, 2011 Hi, I am rendering animation using Light Cache. The problem is that I am getting small flickering on the scene, especially in places with lots of detail. The scene has vegetation and trees, and those flicker a bit. I have noticed that there are differences what antialiasing filter is used, but of course that loses detail also. So is there other options to make the flickering go away? I am using Light Cache for primary -and secondary bounces. I am not using Irradiance Map, because even when precalculated, it takes too much time to render, and I may like better the final image produced with Light Cache than with Irradiance Map, atleast in these particular scene. Thank you. Link to comment Share on other sites More sharing options...
sanmb Posted March 22, 2011 Share Posted March 22, 2011 (edited) 1.Please check whether light source is keyframed and it goes on off 2.Double check light settings 3.Double check camera settings. 4.Double check v-ray settings. Edited March 22, 2011 by sanmb Link to comment Share on other sites More sharing options...
gsscott50@hotmail.com Posted March 22, 2011 Share Posted March 22, 2011 i always use precalculated LC and IR. IR @ Medium (animation). AA settings do have a large impact on geometry flicker and crawl as you say. Using a quadratic filter with min1 max 10 settings always solves this problem for me. I have never used (or heard of anyone else using) LC for primary and secondary for animation, but let me know if you get good results, if you could post a sample of your final animation that would be awesome. Good luck! Link to comment Share on other sites More sharing options...
Nic H Posted March 22, 2011 Share Posted March 22, 2011 LC for primary and secondary will look rubbish. Post a scren shot could also be shitty antialiasing could be anythign really Link to comment Share on other sites More sharing options...
Ardak Posted March 22, 2011 Author Share Posted March 22, 2011 (edited) So, here's scene rendered with Light Cache with Fly-through for primary -and secondary bounces: Rendering time approximately 8 minutes. Here's the same scene rendered with Irradiance Map with Medium (animation) preset for primary bounces and Light Cache with Fly-through for secondary bounces: Rendering time approximately one hour. And I have lots of rendering to do, it would take me months to render with Irradiance Map, and frankly, the results with Irradiance Map aren't that cool, atleast for my eye. Camera settings: VRay Physical Camera All are default pretty much Film Gate: 36mm Focal Length: 44,663mm ISO: 100 Exposure: On Vignetting: On with value of 1,0 White Balance: D65 F-number: 8,0 And other settings: Image Sampler: Adaptive subdivision Antialiasing Filter: For now VRayTriangleFilter with size of 2,5 (experimenting different filters) Though the flickering is not destructive with this filter, it is somewhat noticeable. Color Mapping: HSV exponential Adaptive Subdivision Image Sampler Min.rate: 0 Max. rate: 3 Edited March 22, 2011 by Ardak Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted March 22, 2011 Share Posted March 22, 2011 When rendering with Irradiance as primary, and LC as secondary, ..make sure to tick the box in the LC roll out that says calculate glossies with LC or something like that. If it is not ticked it is probably what is leading to the long render times. Link to comment Share on other sites More sharing options...
Ardak Posted March 22, 2011 Author Share Posted March 22, 2011 I will look into that. Thank you. Link to comment Share on other sites More sharing options...
Ardak Posted March 22, 2011 Author Share Posted March 22, 2011 The render times were massive despite the fact that I ticked that box. Link to comment Share on other sites More sharing options...
Ardak Posted March 22, 2011 Author Share Posted March 22, 2011 i always use precalculated LC and IR. IR @ Medium (animation). AA settings do have a large impact on geometry flicker and crawl as you say. Using a quadratic filter with min1 max 10 settings always solves this problem for me. I have never used (or heard of anyone else using) LC for primary and secondary for animation, but let me know if you get good results, if you could post a sample of your final animation that would be awesome. Good luck! Where exactly I can set the min 1 and max 10 for quadratic filter? I have only option of setting it on. Link to comment Share on other sites More sharing options...
erickdt Posted March 22, 2011 Share Posted March 22, 2011 Adaptive subdivision is causing your flickering problem (flickering details). Use Adaptive DMC instead and set you max/min rate to 2/4 or 2/6 (I typically use 2/6). Adaptive subdivision is probably also causing your excessively long render times too. I'm curious to know what you IR map settings were when you did your LC/IR map test. E Link to comment Share on other sites More sharing options...
Ardak Posted March 22, 2011 Author Share Posted March 22, 2011 It was just Medium (animation) preset, nothing altered. Link to comment Share on other sites More sharing options...
erickdt Posted March 22, 2011 Share Posted March 22, 2011 Do you have a screen shot of the IR map dialogue? E Link to comment Share on other sites More sharing options...
Ardak Posted March 22, 2011 Author Share Posted March 22, 2011 Here it is. And the settings you suggested above did not seem to have effect on the render time, sadly. Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted March 22, 2011 Share Posted March 22, 2011 I would just post your file so it can be looked at. If it is looked at, someone could probably tell you what is wrong in about 5 minutes. Link to comment Share on other sites More sharing options...
Ardak Posted March 23, 2011 Author Share Posted March 23, 2011 Well, there isn't anything worth looking at I think. I have just tried to use Irradiance Map with presets. And Light Cache with Fly-through options and trying Screen and World methods. That's about it. Link to comment Share on other sites More sharing options...
gsscott50@hotmail.com Posted March 24, 2011 Share Posted March 24, 2011 Here it is. And the settings you suggested above did not seem to have effect on the render time, sadly. The mode should be set to either Multipass Incremental (for your GI pass) or to 'From File' for your 'Beauty Pass'. There is no reason that the mode should be on 'Single Frame' if you are rendering an image sequence. If you are unsure have a look at this from the VRay help files.... Link to comment Share on other sites More sharing options...
Ardak Posted March 24, 2011 Author Share Posted March 24, 2011 Oh yeah, I know that the Single frame mode is totally wrong, I just used it for rendering test frames. Link to comment Share on other sites More sharing options...
Ardak Posted March 24, 2011 Author Share Posted March 24, 2011 And if you guys see from the example pictures, the use of Irradiance Map produced some strange lightning artifacts on the plants, in addition that it takes massively more time. How should I render few animations length of 600-1000 frames if one frame renders in about 20-60 minutes? Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted March 24, 2011 Share Posted March 24, 2011 You need to RTM. http://www.spot3d.com/vray/help/150SP1/ Link to comment Share on other sites More sharing options...
gsscott50@hotmail.com Posted March 25, 2011 Share Posted March 25, 2011 or post the scene and I will have a look at it. Link to comment Share on other sites More sharing options...
Ardak Posted March 25, 2011 Author Share Posted March 25, 2011 How should I post it? Because obviously you don't have the needed materials or plugins to view the scene correctly. Link to comment Share on other sites More sharing options...
gsscott50@hotmail.com Posted March 26, 2011 Share Posted March 26, 2011 Go to Save As > Archive. This will zip your scene up with all assets. As for plugins, it doesn't really matter, it's the settings that I am looking at really. Link to comment Share on other sites More sharing options...
fredriklarsson Posted April 5, 2012 Share Posted April 5, 2012 Hi, is this still a problem? Because I have it too and i cant seem to solve it. It says in the documentation that it can be prevented by increasing the filter size, but ti have not figured out a good setting and it gives some weird results. Suggestions? http://www.spot3d.com/vray/help/150SP1/render_params_lightmap.htm Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now