Release Notes for v3.6

• Multi-threading capability (JRP & GS)

• Validation of sensitivity matrix (EP, BX, & JRP)

• Fully separated design from perturbations with perturbation mode command (JRP)

• Implementation of default LSST perturbations in file & move commands (EP, BX, & JRP)

• General architectural simplification, software standards (GS & JRP)

• Generic parabolic telescope (perfect telescope) ISC files (CB)

• Simplification to minimal ISC file set (CB & JRP)

• DES telescope ISC files (JC)

• Tool for ray visualization (JC)

• Tool for SED matching (MW)

• Tool for quick catalog creation (GS)

• Removal of setup that are unnecessary (JRP & CB)

• Relative opacity generalization (JRP)

• Optical design update (EP)

• WCS generic (JC)

• Random number simplification and other helper improvements (JRP)

• Fix to zodiacal light and airglow (JRP)

• Generalized SED band (CB)

• Adjustment to outerscale distribution (MW)

• Tool for ZEMAX for body commands (CB)

• Bright fatter anisotropy (JRP)

• Complex tree rings (JRP)

• Correlation coefficient validation (JRP)

• More functionality for complex focal planes (CB)

• Fix for contamination absorption (JRP)