Feature request: multiple workers for the HDR post-process components

marctavenier · October 23, 2025, 7:30am

I’d like to propose the addition of multiple workers for the following HDR post-process components:

They can be quite slow with multiple HDR files because they only run single core.

I’ve successfully implemented ladybug_rhino.grasshopper.run_function_in_parallel into HB Glare Postprocess. But it would be nice to see it officially implemented. If you’d like for me to share the code, let me know.

Kind regards,
Marc

chris · February 11, 2026, 9:29pm

Nice! I like the idea, @marctavenier , and it sounds like you implemented it the same way that I would do it. Do you want to send a pull request with your component edits to honeybee-grasshopper-radiance?

If you do so, I am happy to test and merge it as a contribution (or make tweaks before merging if necessary).

FYI, if you want to make a contribution the way that LBT developers do, you can use the LB Export UserObject component to get all files that we need to merge the Pull Request.

Otherwise, if you want to keep it simple, just sending a Pull Request that edits the relevant .py files would be good enough for us to test. For example, this is the one for HB False Color:

github.com

ladybug-tools/honeybee-grasshopper-radiance/blob/master/honeybee_grasshopper_radiance/src/HB False Color.py

# This file is part of Honeybee.
#
# Copyright (c) 2025, Ladybug Tools.
# You should have received a copy of the GNU Affero General Public License
# along with Honeybee; If not, see <http://www.gnu.org/licenses/>.
# 
# @license AGPL-3.0-or-later <https://spdx.org/licenses/AGPL-3.0-or-later>

"""
Convert a High Dynamic Range (HDR) image file into a falsecolor version of itself.
-

    Args:
        _hdr: Path to a High Dynamic Range (HDR) image file.
        max_: A number to set the upper boundary of the legend. The default is
            dictated based on the legend_unit_.
        seg_count_: An interger representing the number of steps between the
            high and low boundary of the legend. The default is set to 10
            and any custom values input in here should always be greater
            than or equal to 2.

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