This dialog controls the transparency of the content. it is now called Smoke density.
Based on (MXS: targ) - the channel that determines the smoke density. The default option is simple smoke, which produces the smoke channel without curve transformation.
Texture (MXS: ttxt) - if the Based on parameter is set to Texture, or if Modulate is checked, this slot specifies the texture to be used.
Reset - resets the settings to their default values.
Modulate (MXS: mod_t) - when the Source is not Texture, this checkbox allows the Source to be multiplied by the texture in the Texture slot.
Meaning (MXS: transpmode) - determines the meaning of all the values: Opacity or Transparency.
Exit shading level (MXS: stoptransp) - this parameter increases the performance when very dense smoke is shaded. It causes the shader to stop traversing when the total opacity exceeds a given value (or when the transparency drops under some value). This value is specified in the field to the right.
Skip shading level (MXS: skiptransp) - this parameter increases the performance when the empty area surrounding the smoke is rendered. It causes the shader to skip the rendering when the opacity is under the specified value (or the transparency is above).
Simple smoke factor (MXS: smoketransp) - when the Based on parameter is set to - Simple smoke this value is used as opacity multiplier.
Transparency/Opacity diagram (MXS: transp_s,
transp_v) - this diagram allows you to specify the transparency/opacity at given point as a function of the channel selected in the Based on parameter.