jlcDesign

A thousand points of light...

Recommended Posts

Hope you guys can help. I can't seem to figure out what wacky circumstance is causing this particular file to process raytraces with a zillion white pixels in it.  I'm sure it has something to do with the lights, but none of them are more than around 60 watts.  Even if I run this to 150 passes, there are still little white pixel fairies (fewer, but still).  Anyone?  Anyone?

weird raytrace.jpg

Share this post


Link to post
Share on other sites

it's definitely a light problem. Suspect it is one or all of the point lights. Turn them off and run a quick Ray Trace, you will know in about 3 passes. If it's much cleaner start turning them back on one at a time. You may need to reduce their intensity. If you post the plan I can take a look at it.

Share this post


Link to post
Share on other sites
1 hour ago, jlcDesign said:

Thanks Graham!  Here's the plan (dropbox link)...   https://www.dropbox.com/s/6sladq7gjl1q7mp/Jarrell for CA.zip?dl=0 

 

Particularly camera 11 & 12, but it's also done it to me with the ext. views unless I turned off the porch lights (which I did).  Super-weird.

Turn "photon mapping" off in ray trace settings and give it a try

im on the road so I can't say for sure but suspect that's the problem, or rather the culprit.. photon mapping can take a 100 plus passes with multiple lights in a scene 

Share this post


Link to post
Share on other sites

Yup, turned off "photon mapping" and they went away.  Used light settings for camera 11 which is quite dark.  Tried camera 12 but it was weird with no walls - at least that is what I got when opening your file.

Share this post


Link to post
Share on other sites

I tip my hat to Rene's rendering capabilities and won't argue his advice.  I would like to point out however that turning off photon mapping should not be considered a "solution" but rather a compromise.  IMO you will lose a substantial amount of realism by turning that setting off (may or may not be fine depending on the situation).  The real solution in my mind is to really work on your methods through lots of experimentation by getting a feel for:

 

-Lighting (type, quantity, location, color, intensity, etc.),

-Material settings (this can get very complicated but it is a crucial part of obtaining good looking results) on an object by object and even surface by surface basis.  

-Ray trace settings.  I think it would help greatly to search out and study some of the terminology such as photon mapping, caustics, ambient occlusion, etc.  

 

When it comes to ray tracing I really believe there are no real short cuts.  Every model and even every scene seem to be a little different and bring their own unique challenges. It takes dedication to the art and a lot of practice.  

 

Best of luck.

 

Share this post


Link to post
Share on other sites

Thanks Michael.  I appreciate your candor, and kind-of pride myself in some really well-done raytraces.  This is the first time I've been stymied by this type of issue and I don't have more than the usual amount of lighting, but you're right-- I'll have to dig into the advanced settings for ray tracing.  I've been doing this for 15 years.  I guess it's about time :P

Share this post


Link to post
Share on other sites
5 hours ago, jlcDesign said:

Thanks Michael.  I appreciate your candor, and kind-of pride myself in some really well-done raytraces.  This is the first time I've been stymied by this type of issue and I don't have more than the usual amount of lighting, but you're right-- I'll have to dig into the advanced settings for ray tracing.  I've been doing this for 15 years.  I guess it's about time :P

Well said to Michael, photon mapping used to be unchecked as a base option, with x9 the setting was checked on default.. I'm not in front of my computer right now so this is out of memory but I believe photon mapping's primary use is to develop caustics and subsurface scattering through translucent surfaces. The more direct light and less ambient light you have, the more difficult it is for the photon mapping to calc.. if you want to keep pushing the rendering envelop you'd really need to play with point lights and material properties as well as exterior point lights. The Particles you see are your computer trying to "find" light coming through windows and slipping into dark corners of rooms or bouncing off of reflective surfaces... when I was using chief for rendering it was necessary to significant play with individual lighting settings, turn up internal ambient light in your 3D dbx. And play with the ambient occlusion settings in your ray trace dbx. After all that was set photon still took a 100 passes to clear the noise

Share this post


Link to post
Share on other sites

The problem is the 4 exterior point lights on the garage. For some reason the position of the light within the fixture is incorrect. Open up the light fixture DBX, select Light Data tab, under Offset change the Y Position to -4.

 

Here is a Ray Trace as per the original plan setting. 5 passes.

594e740581897_Untitled1.thumb.jpg.7992ca14b066ff72e0a5aefd8ed6de28.jpg

 

Here is the same scene with the Offset changed. 5 passes.

594e741a44554_Untitled2.thumb.jpg.dcf0e49ded7baac8c2af6f0f1a990d32.jpg

 

Whenever you get speckles it will be related to a light fixture and in most cases it will be a point light. The position of the light source within a fixture is critical, it can't be such that it is occupying the same region as a material. If you resize a light fixture the offset does not adjust to the new sizing and as such you may need to manually make this adjustment. This was not the case here as the fixture is as per the original library model, must have just been an oversight when this model was originally created.

  • Upvote 5

Share this post


Link to post
Share on other sites

Thanks Scott. I checked out a few more of those exterior lights in the plan which were originally turned off. They also need to be adjusted. They are the exterior point light fixtures on the back of the house.

 

Existing settings, 10 passes.

594e843775060_Untitled3.thumb.jpg.e4b9528e761dab4d328ddb66c617d9c7.jpg

 

After adjusting the Offset, 10 passes.

594e8461cdec2_Untitled4.thumb.jpg.4c6b2c43daa19ca6dbeb41872ae9e31f.jpg

 

As you can see, it doesn't take much for things to get really screwed up. This plan has 65 lights and if only one of them is not right then everything can be a mess. I have always found this to be those point lights and I really never use them very much, usually convert them to spot lights. Less problems and Ray Traces will run faster.

 

Share this post


Link to post
Share on other sites

All of you guys...

giphy.gif

 

I never would have figured it out.  Thanks so much!  Related to lights, anyone got a good lead on some under-cabinet LEDs?  I'm so tired of the big clunky flourescents that CA offers.

Share this post


Link to post
Share on other sites

Just curious if anyone (Renerrabbit) any other program for rendering? An Architect, who uses SketchUp, shared an image he did in Render[in] that works inside of SketchUp, like when we take a Full Perspective camera to navigate around our model. You simply open the plugin and turn on the lights and adjust the intensity. You get instance views in realtime. It's amazing!!!!!

 

if only Chief had such a feature?????

 

 

Share this post


Link to post
Share on other sites

maybe X10, but They don't tell me anything.

Share this post


Link to post
Share on other sites
On 6/23/2017 at 4:16 PM, jlcDesign said:

A million thanks to both of you!

 

giphy.gif

What is with these Grinch hands she has going on here?! The minute I saw this I had to say something. This gif. is a running joke in my house. 

Share this post


Link to post
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now

  • Member Statistics

    27491
    Total Members
    6254
    Most Online
    alexvictory
    Newest Member
    alexvictory
    Joined
  • Similar Content

    • By acquavella
      Hello! I'm using X7 Interiors as I specialize in kitchen and bath.  I recently bought a new iMac (specs below) hoping that Chief Architect would work better as it would suddenly quit with errors when I was running it on my 2013 MacBook Pro.  The random quitting still occurs (which is annoying, but that's not my question here); however, ray trace which, ironically, worked on my 2013 MacBook Pro will not even start on my 2017 iMac.  I receive the following error:
       
      /Users/autobuild/p4sync/dev/releases/17/chief/source/raytrace.cpp(619): Error #272032202
      "Unable to open ray tracing engine - ray tracing disabled for this session."
      10/24/2018 10:49:20 PM
      Build: 17.3.2.2OSX
       
      I've already tried their suggestions... I made a simple plan and it still came up with the error.  Then I checked for updates in both Chief Architect and my system and they are up-to-date.
       
      I plan on upgrading in December to the newest Chief Architect assuming these problems will go away... but I'm scared that they won't.
       
      Any help or ideas would be appreciated! Thanks!
       
      Chief Architect Interiors X7
      Build: 17.3.2.2OSX
       
      iMac (Retina 4K, 21.5-inch, 2017)
      3.6 GHz Intel Core i7
      Memory: 16 GB 2400 MHz DDR4
      Video: Radeon Pro 555 2048 MB
    • By MAINEWOOD59
      I added a light source to the raytrace, but do not want it to show on the ceiling?

    • By SMC2992
      Hi friends:
       
      I have done a ray-trace for about 17 hours or so for 35 passes, but I am getting light behind the chair arm, which I don't know why?
      Can any one help me to find out why I am getting this light behind the chair.
      Software is X10
       
      Thankyou
      Salah

    • By BruceBoardman
      Good day all,
       
      I am using v10 on a MAC. I'm an intermediate user and don't use Ray Trace a TON. 'Doing my first set of traces is v10 and all my setting seem to be off. My ceilings are glowing, the lighting doesn't seem right. Blah blah blah. I have imported defaults from an older file that had my best settings.  I have a presentation this afternoon to sell this project anyone able to open this file and see what my deal is?? Oh and I can't figure out where to change my backdrop, either. Did it move?
       
      What am I missing? I'm sure it's simple.
       
      GAT_glowing_effect.plan.zip
    • By limitless8
      So simple I think question that I can't figure out, for example I split my 4k screen into two screens, in one 'screen' I have a ray trace scene ready, and let's say its 2000*1000 pixels, and I want to increase the pixel density, meaning make it a truly 4k image, but I don't want my scene view to expand?  I've tried to figure this out and in the ray trace window I would put in new values, but in the end the ray trace scene view would expand... not sure if I made sense...Basically let's say I want to ray trace the view of a table, and when I increase the pixels to 4k it ends up including the neighboring cabinet that wasn't in the original window. I don't want the field of view to expand, rather pack more pixels in the current camera view/active window.
       
      Any and all help much appreciated!