Model spectra for the parameter study to reduce crystalline features in the 10 µm silicate feature. Model(a) has crystal reservoirs with 50 (solid line) and 10% (dashed line) crystallinity instead of 100%. Model(b) is depleted in small silicate dust in the inner disk. The solid line shows a model that small silicate dust is replaced with featureless amorphous carbon, and the dashed line is a model that small dust in the inner disk is completely removed. Model(c) is depleted of small dust less than 1 (solid line) and 3 µm (dashed line) all over the disk.