RevitGary Posted October 4, 2009 Share Posted October 4, 2009 Trying to get rid of little white specs on floor / see red circle I have tried different settings and materials. I even cranked up the glossy reflection precision and glossy refraction precision to the max. This helps but also makes a 6 minute rendering time an hour and a half rendering time. There has to be an easy solution and not increase rendering times as much. Help thanks! Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 4, 2009 Share Posted October 4, 2009 please post the materials settings and or you light set-up jhv Link to comment Share on other sites More sharing options...
RevitGary Posted October 5, 2009 Author Share Posted October 5, 2009 here they are thanks! Link to comment Share on other sites More sharing options...
RevitGary Posted October 5, 2009 Author Share Posted October 5, 2009 lights Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 5, 2009 Share Posted October 5, 2009 OK I'll start on the materials Dial up the Glossie reflection samples, 15 -20 should do it Turn ON Fast interpolate, then the Fast Interpolate should be Grid density 1, Neighbour lookup 2, High detail ON and set to 2m (I cant get my head around ' &" so convert) Amient Occlusion 500mm 4" will give you a really sharp and un-natural shadow. Lights, Rather than increasing the suns and sky multipliers, use exposure control Turn Aerial persective OFF Are there any really bright materials (ie self illuminating)? jhv Link to comment Share on other sites More sharing options...
RevitGary Posted October 5, 2009 Author Share Posted October 5, 2009 I tried everything you suggested. Still have the specks. I thought turning up skyportal settings was an acceptable way of getting more light into a room while not having the outside elements wash out. I know you should not turn up the sun multiplier. back to the specks . I put in a grey pearl material still have the specks. I turned the skyportals to 1 still specks any more ideas? Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 5, 2009 Share Posted October 5, 2009 You are right in turning up the portal light to get more light, however you had both portal lights and the sky dialed up. What about really bright materials, are there any? What GI methode are you using? Just FG or Photons and FG? Sometimes turning the Frame buffer to 16bit helps by clamping the speckes These are the typical area to look at, I would need to see the file to trouble shoot more. jhv Link to comment Share on other sites More sharing options...
RevitGary Posted October 6, 2009 Author Share Posted October 6, 2009 I think i figured it out. It seems much better when I increase the samples on the skyportals. I made them 64. Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 6, 2009 Share Posted October 6, 2009 (edited) Hope you dont mind I thought I post my findings for others to learn/ suggest too From a few experiments I think its the portal light intersecting geometry. This is a few things I have changed. 1) Leave the Environment Ambient colour black, anything else artificially lightens the scene and messes with alot of behind the scenes maths. 2)When using Photons leave FG bounces @ 0 3)Box AA set to 1/4 ,4 is really low and overly sharp which doesn't help with the speckles 4) The Grey materials, glossie sample were way too low, combined with the lower "Global Glossie Accuracy" settings added to the speckles. 5) Move the portal lights away from intersecing geometry. I also made them a bit smaller to get a better spread of light. 6) Take a look at the FG and Photons settings. The Sample radius needs to be tweaked more 7) I set the Physical scale to Physically correct rather than unitless. and lowered the EV to brighten the scene. 8) I'd suggest setting all the glass elements to "Pass through" FG and Not Generate GI (But still recieve it) this will alow more samples into the room. There maybe other things I did (I cant quite remeamber what though) JHV Edited October 6, 2009 by Justin Hunt Link to comment Share on other sites More sharing options...
RevitGary Posted October 6, 2009 Author Share Posted October 6, 2009 Thanks how about posting an image? Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 6, 2009 Share Posted October 6, 2009 Sure, I'll just have to re-render it, I didn't save it last time jhv Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 6, 2009 Share Posted October 6, 2009 here you go. I have just noticed something very strange going on with the rail under the stairs?????????????????????? jhv Link to comment Share on other sites More sharing options...
RevitGary Posted October 6, 2009 Author Share Posted October 6, 2009 THANKS!! I dont know why you have jaggies on the stair rail. Maybe that is your screen backround black in the back. That would give it the jaggies. how about up top on the boards why is it so splotchy? Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 6, 2009 Share Posted October 6, 2009 thats got to do with the photon sample size and the really low photon numbers I was using. Mainly to speed up rendering for testing purposes. I wouldn't use these for production. jhv Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 7, 2009 Share Posted October 7, 2009 had a bit more of a play, I couldn't help myself sorry. I striped and simplified the materails to get the lighting better. Also tweeked the lighting and render settings jhv Link to comment Share on other sites More sharing options...
RevitGary Posted October 7, 2009 Author Share Posted October 7, 2009 how long of a rendering time was it? Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 7, 2009 Share Posted October 7, 2009 about 30 seconds for the Photon and FG and 8 minutes (or so, I didn't take note of the time) for the render. jhv Link to comment Share on other sites More sharing options...
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