Houdini Main Changelogs

Houdini 5.5.30 The behaviour of the "Visibility" masks in the RenderMan output driver has changed subtly.

For the "Photon Visibility" parameter, if no string is specified, not photon visibility attributes will be output to the RIB stream. If a mask is specified, all objects which match the mask will have "visibility photon" turned on, while objects which do not match the mask will have the visibility turned off.

"Shadow Visibility": If an object is specified in any of the shadow masks of the contributing light sources, OR if the object matches the shadow mask specified in the output driver, then visibility will be turned on. Otherwise shadow visibility will be turned off.

"Trace Visibility": If an object is specified in any of the reflection masks of any objects, OR if the object matches the trace mask specified in the output driver, then visibility will be turned on. Otherwise trace visibility will be turned off. For Entropy, this is the "reflection" visibility attribute. For prman 11, this is the "trace" visibility attribute.

Fri. June 21, 2002
Houdini 5.5.30 Initial support for prman11 feature set has been added:
  • Object reflection masks are used to determine ray-tracing subsets in RIB generation.
  • The "Visibility Trace" parameter can be used to augment the "visibility" "trace".

    If the mask is specified in the output driver, then objects matching the mask will automatically have "trace" turned on. If there is no pattern specified, or if objects do not match the pattern, then all other ray-tracing masks (shadow masks on lights and reflection masks on other objects) are used to determine whether the object should have "trace" turned on.

    For example:

    • "Visibility Trace" mask in output driver is set to "geo*"

    • Object "boat" has a reflection mask of "sky,water".
    • No other objects have relfection/shadow masks set.
    • Object "sun" would not have the "trace" flag turned on.
    • Object "water" would have the "trace" flag turned on. (as it's reflected in the object "boat").
    • Object "geo3" would have the "trace" flag turned on (by the "Visibility Trace" parameter in the output driver)
  • A new parameter "Visibility Photon" is used to determine whether objects are visible in photon map generation. If the photon

  • There are parameters in the output driver which control some aspects of global illumination/photon mapping.

Fri. June 21, 2002
Houdini 5.5.30 The dithering algorithm was changed in mantra. Mach bandind should be less severe now. However, images will be quantized differently now (incompatible with previous versions of mantra). Thu. June 20, 2002
Houdini 5.5.30 Dithering was changed in mantra. This will result in different rendered images. Mach band artifacts should be a lot less severe now. Thu. June 20, 2002
Houdini 5.5.29 There was an error with the Houdini display driver for RenderMan that would have caused crashes. This has been fixed. The Entropy display driver and mental ray display drivers would not have been affected by this bug. Thu. June 20, 2002
Houdini 5.5.29 From the mplay "Load..." dialog, hitting the button to create a new directory would bring up the Create New Directory window, but you couldn't type into it or press any buttons on it. This has been fixed. Thu. June 20, 2002
Houdini 5.5.29 Laying out VOP tiles now takes into account whether or not the VOP tile inputs and outputs are hidden. We still layout all tiles as if they were the size of the largest tile, but by hiding the inputs, the largest tile can be made much smaller. Thu. June 20, 2002
Houdini 5.5.29 Fixed bug with the cancel on the custom panel builder. Thu. June 20, 2002
Houdini 5.5.29 Fixing hcustom for Linux. Before, it would complain about missing files, like UT_RefArray.C. Thu. June 20, 2002
Houdini 5.5.29 Rotoscoping is much more efficient now, and works properly with both versions of COPs. Wed. June 19, 2002
Houdini 5.5.28 Fixed a loading problem with vopnet parameters not being present when ops of this type were being created. Wed. June 19, 2002
Houdini 5.5.28 The auto-creation of Parameter/Constant VOPs is now undoable.

The "Marine Water" VOP has been renamed "Water Surface".

Wed. June 19, 2002
Houdini 5.5.28 Fixed a bug that was causing Houdini to crash regularly. Changing the value of a parameter in an operator defined by a VOPNET could crash if a Parameter VOP was recently added to the VOPNET. Tue. June 18, 2002
Houdini 5.5.27 New Marine Water and Hair VOPs in the Materials toolbar. Tue. June 18, 2002
Houdini 5.5.27 Whenever the defining vopnet changes a parameter's default value, any instanced node whose parameter was at the default value will change to reflect the new default. This also occurs whenever a scripted node's dialog script changes. Tue. June 18, 2002
Houdini 5.5.27 Using "Paste Copied Values" on a single component of a parameter (eg. tx of Translate) now works. Tue. June 18, 2002
Houdini 5.5.27 Object Merge SOPs should now properly get the different possible inputs from subnets when the subnet's display and render flags are different. Tue. June 18, 2002
Houdini 5.5.26 Fixed bug where selecting all the nodes in a Wood Plank VOP and choosing "Collapse to SubNetwork" would result in errors in the new subnet. Mon. June 17, 2002
Houdini 5.5.26 When creating a new VOP type from a Subnet VOP or from an Inline Code VOP, the new VOP type now has parameters created by default which serve as the input values used when an input is not connected. Mon. June 17, 2002
Houdini 5.5.26 New Matte and Shadow Matte VOPs in the Materials toolbar. Mon. June 17, 2002
Houdini 5.5.26 Improved interactive speed when moving bones that have captured geometry using the Capture or CaptureProximity SOPs. Mon. June 17, 2002
Houdini 5.5.24 Added 4 commands for modifying the Image viewers in COPs.

        imgview : sets the global display options
        imgview2d : sets the 2D view options
        imgviewtime : sets the Timeline view options
        imgviewhist : sets the Histogram view options

The display options for the COP viewers are now saved in the hip file.

Fri. June 14, 2002
Houdini 5.5.23 Adding the RenderMan display driver to the Windows distribution. Fri. June 14, 2002
Houdini 5.5.23 New Stone and Stone Wall material VOPs in the Material toolbar. Fri. June 14, 2002
Houdini 5.5.23 The Vertex SOP now behaves differently (and correctly) from version 5.0 to fix a bug. This change affects the vertex SOP with two inputs. Fri. June 14, 2002