Jeroen Bakker
032c741214
The calculation of the irradiance buffer was slow. Now it is only calculated when it is being used (background_alpha > 0.0) this solves the freeze when switching to LookDev mode. Also changed the default calculation to use the Spherical Harmonics calculation. This is able to generate the irradiance buffer fast, but is less accurate. As the irradiance buffer is only used for visual guidance speed is more important than accuracy. Added compile directive to switch between the implementations. (see STUDIOLIGHT_IRRADIANCE_METHOD) Disabled caching the irradiance buffer when STUDIOLIGHT_IRRADIANCE_METHOD_SPHERICAL_HARMONICS is used as it is not needed.