Using Boolean operation (intersection, subtract and combine) could be very handy,
We will make different ceiling details using different objects, you could also use cutout as explained in the tutorial DLX-T13. but lets see the difference!
for this tutorial create a room 6×6 with 4m height
Lets work to make the segments less visible in the next steps
Watch out the next Step works only if you have a pc with good processor and RAM,otherwise DIALux might crash ,so Save you project before the next step
if DIALux crash then try with less Number of sphere may be 40 or 30
i have done it with 40 sphere.
you can use Truncated pyramid object with circular arrangement to get a cone
for other DIALux evo Tutorials DLX-T
you can also visit the LdG Lighting Design Guide page