Simulation Settings
Last updated
Last updated
We recommend defaulting to 'High' for all project deliverables when modelling daylight. 'Low' can be used to get fast results during early design stages or to check design changes, but should always be avoided for reporting final results.
The table below presents various radiance parameters used in daylight modelling, categorising them from "Low" to "High".
These parameters define different levels of accuracy and quality in the simulation, with corresponding settings for ambient parameters. The higher the quality, the more precise the modelling, but it may require more computational resources. This categorisation helps select the appropriate settings based on the project's requirements, balancing accuracy, quality, and computational efficiency.
Low
Fast, but not recommended for project work
1
0.3
128
256
128
Standard
Lowest usable quality - but will underestimate illuminance
3
0.25
256
512
256
Good (no interpolation)
4
0.00
512
1024
512
Good
Default setting for balanced accuracy and simulation speed
4
0.22
512
1024
512
Accurate
Best setting for highest practical accuracy
5
0.20
512
2048
1024
High
Use when highest quality is required and a long wait for results is acceptable
7
0.18
1024
4096
204
In addition to the above, Direct Daylight Settings can also be for Daylight Factor simulations.
Direct Sampling (ds)
Direct lighting contributions are directly sampled to improve accuracy in rendering or simulation.
0.05
Direct Thresholding (dt)
Applies a threshold to direct lighting contributions, ignoring values below a certain level to optimize computation.
0.15
Direct Certainty (dc)
Prioritises direct lighting calculations based on their certainty or reliability, enhancing simulation accuracy.
0.75
Direct Presampling Density (dp)
Adjusts the density of pre-sampled direct lighting data, balancing accuracy and computational efficiency.
512
Grouped Ambient Cache
Applies to Daylight Factor simulations. Controls whether rtrace simulations are grouped by Zone (enabled) or combined into a single simulation (disabled).
Enabled
