PhoenixFD Simulator > Rendering > Transparency
This rollout controls the transparency of the fluid during rendering. Note that the values for transparency/opacity are per cell, so the total opacity of the fluid will change if the resolution is changed.
Source trSource - the source channel passed to the shader.
Texture trTexture - if the Source is set to Texture this slot specifies directly the transparency/opacity. Otherwise, if Modulate is turned on, this texture is multiplied by the Source.
Reset phxfdSim -a "resetT" -node "..." - resets the settings to their default values
Modulate trModulate - - if the Source is set to Texture this slot specifies directly the transparency/opacity. Otherwise, if Modulate is turned on, this texture is multiplied by the Source.
Temperature/Smoke/Velocity/Fuel Offset trRampOffset_t, trRampOffset_s, trRampOffset_v, trRampOffset_f - controls the ramp starting position for the corresponding channel. All preceding positions will use the value at the start of the ramp.
Temperature/Smoke/Velocity/Fuel Scale trRampScale_t, trRampScale_s, trRampScale_v, trRampScale_f - sets the ramp scale, i.e. the range of positions that will have their values from the ramp. All succeeding position will use the value at the end of the ramp.
Transp/Opacity Scale trRampMaxValue - the maximum transparency/opacity value in the ramp.
Meaning trMeaning - determines the meaning of all the values: Opacity or Transparency.
Transparency/Opacity ramp trRampAlpha_t, trRampAlpha_s, trRampAlpha_v, trRampAlpha_f - this ramp allows you to specify the transparency/opacity at a given point as a function of the channel selected in the Source parameter
Exit Shading Level trExitShLevel - this parameter increases the performance when very dense smokes are shaded. It causes the shader to stop traversing when the total opacity exceeds a given critical value (or when the transparency drops under some value). This value is specified in the field to the right.
Skip Shading Level trSkipShLevel - 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 trSimpleSmFactor - the transparency source parameter has an additional channel - Simple smoke. In fact the source channel is Smoke, but instead of the diagram a simple formula is used. The formula calculates the transparency of a cell with given smoke concentration according to this parameter. The meaning of the value is the transparency/opacity of a cell with Smoke=1.