dpap Posted December 2, 2015 Share Posted December 2, 2015 I am trying to keep Maya out of my way but Vray takes me there, with this specific lighting scenario Can you help me stay in Houdini/ Mantra and render this scene with approximately the same amount of noise, in approximately the same time per frame ? (~2min/frame) I tried PBR but its very noisy when I try to keep things within the 2min per frame limit. It's noisy enen if go all the way to 4.5 minutes. I tried using the GI Light in Houdini but the results where not satisfying either. In Vray I use Brute force and Light Cache. In the uploaded video you can see the Vray result - some of the artifacts are due to the compression. The .exr sequence is a bit better Is it doable? Any words of advice? Thanks in advance Mantra Vray Compare 1.avi mantra vray 1.hip Quote Link to comment Share on other sites More sharing options...
hall Posted December 2, 2015 Share Posted December 2, 2015 dpap, thats my try. 6min. 2.4ghz -8 threads. ( i5 macbook) you could also apply a denoiser in post and reduce a bit more the sample amount. mantra vray 1_HIC.hip Quote Link to comment Share on other sites More sharing options...
sekow Posted December 2, 2015 Share Posted December 2, 2015 (edited) i didnt had a look at your scene, but if you using emission, dont. use a geometry light. the sample handling is better edit: had asecond look at the pictures. thats projected texture right?. dont mind what I said Edited December 2, 2015 by sekow Quote Link to comment Share on other sites More sharing options...
SreckoM Posted December 2, 2015 Share Posted December 2, 2015 Maybe you can try something like this. Not sure will this work for you but results are similar and render time is little bit more than 2 min on my laptop. I guess you will not get Vray render times because you are using LC and that speeds up brute force calculation, and in Houdini you just got brute force, it is just slower by default. mantra vray 2.hiplc Quote Link to comment Share on other sites More sharing options...
hall Posted December 2, 2015 Share Posted December 2, 2015 Srecko, nice! I did small updates in your scene (increased noise level), 1:30sec (i7 3770 - 8 threads 3.4ghz). Quote Link to comment Share on other sites More sharing options...
SreckoM Posted December 2, 2015 Share Posted December 2, 2015 Gr8! Quote Link to comment Share on other sites More sharing options...
dpap Posted December 2, 2015 Author Share Posted December 2, 2015 (edited) thanks for taking the time to have a look guys! @Srecko I understand your approach but I want to only use one rotating spotlight to mimic a video projector that moves in semi-closed interior space and is the only light source. By turning of the Spotlight option and turning the Type to Sphere, you have a totally different lighting scenario. My bad ! I should have deleted the one spotlight that has no animation. I will upload a cleaner .hip @Hickstein Nice! I get less noise and render time of 02:06 for frame 0 . But I see that turning the Diffuse Limit to 1 makes a huge difference in render time but it has also an impact on the overall illumination that is bounced around. See the back wall at the .gif I attached . I was surprised you turn of Adaptive Sampling. I thought it helps a bit. Edited December 2, 2015 by dpap Quote Link to comment Share on other sites More sharing options...
dpap Posted December 2, 2015 Author Share Posted December 2, 2015 A little of topic. There is a difference between the viewport and the render ! Why is this happening ? Is it a bug? viewport-render difference.hip Quote Link to comment Share on other sites More sharing options...
Erik_JE Posted December 3, 2015 Share Posted December 3, 2015 Got some vague memory that the viewport uses the regular raytracer and not pbr Quote Link to comment Share on other sites More sharing options...
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