See the top rated post in this thread. Click here

Results 1 to 8 of 8

Thread: Shadows... how to soften edges?

  1. #1
    100 Club FWSchreck's Avatar
    Join Date
    2000-12
    Posts
    177
    0 Did you find this post helpful? Yes

    Default Shadows... how to soften edges?

    Hello:

    I'm experimenting with Revit's various light source options. I have made a simple model of an office that contains a couple of light families. These families employ the "point+spherical" light source definition.

    In the attached sample rendering, the lamps cast very sharp shadows on the surfaces of the room. How can I soften those edges?
    Attached Images Attached Images
    Fred Schreck
    KMD Architects
    San Francisco, CA, USA
    www.kmdarchitects.com

  2. #2
    Revit Technical Specialist - Autodesk Scott Davis's Avatar
    Join Date
    2003-04
    Location
    Chino, CA
    Posts
    4,752
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    In the render dialog box, have you copied one of the default "low/medium/better" rendering settings to Custom, and then tweaked the settings? Try it. There is a setting in there for Soft Shawdows, and that might help you out.
    Scott D Davis
    AEC Technical Specialist
    Autodesk, Inc.

    http://about.me/scottddavis

  3. #3
    Revit BIM Consultant Alfredo Medina's Avatar
    Join Date
    2008-05
    Location
    Miami, FL
    Posts
    1,032
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    Quote Originally Posted by Munkholm View Post
    ...Anyone knows excactly how to adjust these settings ?
    Those angles are type parameters of the lighting fixture, when the light source in the family is set to "Point+Spot". Then, in the project, in the view where you want to adjust these angles, go to Visibility Graphics, and under Lighting Fixtures, activate Light Source. See illustration.
    Attached Images Attached Images

  4. #4
    All AUGI, all the time Munkholm's Avatar
    Join Date
    2006-09
    Location
    The Kingdom of Denmark
    Posts
    560
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    Thanks Alfredo, should have been more specific

    What i meant is, anyone have experience with the ratio between "Field Angle" and the "Beam Angle"

    Latest 3 test from above message=
    "Field Angle - 90" and the "Beam Angle - 90" = HARD shadows on wall
    "Field Angle - 160" and the "Beam Angle - 80" = SOFT shadows on wall
    "Field Angle - 160" and the "Beam Angle - 160" = HARD shadows on wall
    In all 3 cases, there is a hard octagon shaped spot on the floor...
    Last edited by Munkholm; 2011-01-10 at 01:35 PM.
    - Klaus Munkholm

  5. #5
    Revit BIM Consultant Alfredo Medina's Avatar
    Join Date
    2008-05
    Location
    Miami, FL
    Posts
    1,032
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    I think getting soft shadows has more to do with Exposure control settings than the light source angles, but it helps, as you found, that the field angle is wide. I made some tests with the second set of settings you recommended: "Field Angle - 160" and the "Beam Angle - 80" = SOFT shadows on wall", but I also dimmed the light to a 0.5 , and made some changes in the Exposure control settings. Attached is the result; and the settings.

    About the octagon on the floor, did you try with a different light fixture? For this test, I used "M_Downlight - Spot - 90 Degree Tilt - 277V".
    Attached Images Attached Images

  6. #6
    All AUGI, all the time Munkholm's Avatar
    Join Date
    2006-09
    Location
    The Kingdom of Denmark
    Posts
    560
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    The "M_Downlight - Spot" family is build with the light source beeing outside the shade... seems to work, just like the initial tests i ran, without a shade... but, where I come from, most light fixtures have the bulp inside a shade, and most certainly not hanging out of the shade

    The conclusion so far, must be to "cheat" and leave the bulp (light source) outside of the fixture, so octagon spots and hard shadows are avoided - And play around with the field and beam angle, until you´re satisfied
    Will that do for an answer fred.3541 ?
    Last edited by Munkholm; 2011-01-10 at 01:36 PM.
    - Klaus Munkholm

  7. #7
    100 Club FWSchreck's Avatar
    Join Date
    2000-12
    Posts
    177
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    Munkholm:

    Thanks very much for your analysis.

    I think we can all agree that Autodesk needs to improve Revit's lighting family parameters, setup and rendered output. There's simply too much trial and error involved in achieving the desired results. This frustrates users on tight deadlines.

    Also, why not simplify "exposure control"? Users should be able to save EC settings as a style or template that can be applied to multiple views. Currently, this must be done manually.
    Last edited by fred.3541; 2010-09-08 at 08:40 PM.
    Fred Schreck
    KMD Architects
    San Francisco, CA, USA
    www.kmdarchitects.com

  8. #8
    I could stop if I wanted to
    Join Date
    2007-03
    Posts
    213
    0 Did you find this post helpful? Yes

    Default Re: Shadows... how to soften edges?

    To soften the light, make the source wider instead of a point source, try a 2"x2" rectangle. Also, make sure you have lots of indirect lighting bounces in your custom rendering settings.

Similar Threads

  1. Curved edges shown as straignt edges
    By MARK.PATERSON in forum AMEP Wish List
    Replies: 2
    Last Post: 2009-03-26, 06:51 PM
  2. Soften out polylines....??
    By duaner ekim in forum ACA General
    Replies: 1
    Last Post: 2008-11-07, 05:16 PM
  3. Soften out polylines....??
    By duaner ekim in forum AutoCAD Map 3D - General
    Replies: 1
    Last Post: 2008-11-06, 05:14 PM
  4. Soft shadows from lights = jagged edges
    By patricks in forum Revit - Rendering
    Replies: 1
    Last Post: 2006-02-25, 05:27 PM
  5. Jagged edges instead of nice smooth edges on Rendered model
    By strangedj in forum AutoCAD 3D (2006 or below)
    Replies: 3
    Last Post: 2005-04-25, 11:50 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •