Hi izumi ,
We have also noticed this at close distances with the current dot projector - dot pattern isn't the best, and at close ranges it actually makes the depth worse (as you have seen). We are currently evaluating a different dot projector, and initial measurements look promising. We believe that production ETA would be Q2/Q3 this year. Some screenshots below, and we will share full test results as well. New dot projector pattern on the right - and the fill-rate is also improved. For now, I would suggest going with full power at close range with the current dot projector. Thoughts?