This page provides information on the Volume Grid's Preview tab.
Overview
The Preview properties is part of the Volumetric Grid Parameters and is located on the Preview tab.The options in the Preview rollout only affect how the VRayVolumeGrid is displayed in the viewport. These settings do not affect the final rendering.
UI Path: ||Select VRayVolumeGrid|| > Properties Panel > VRayVolumeGrid node > Preview tab
Preview
Detail reduction – Increase this parameter if the interface starts to lag because of the size of the simulation. A value of 1 means no reduction. This parameter controls both the viewport preview and the GPU preview.
Auto reduction – Enables automatic adjustment of reduction in detail due to the Detail reduction setting. The preview detail will be reduced to the point where the preview will display fast without blocking the interface. Note that the detail will only decrease automatically, but will not increase.
Only if selected – When enabled, the content is displayed in the viewports only when the VRayVolumeGrid is selected.
Bounding box – When enabled, shows a white box that represents the size of the grid specified in the grid settings and a red box that is the size of the loaded frame for preview and render.
Bounding box cells – When enabled, shows a lattice with the cell sizes on the sides of the VRayVolumeGrid box.
Cell Preview
Auto Range – Automatically adjusts the preview ranges of visible channels for the current frame, so that important data is always visible and the preview is always quick.
Draw just a slice – Only a cross-section of the grid that is one voxel thick is visible in this mode. This allows for a better view of occluded details, and can help when previewing very rich data such as velocity fields.
Slice level – The offset of the slice from the bottom center of the grid, in voxels.
Show only the overlap with – When enabled, shows only the cells where the selected channels (below) overlap:
Temperature – Enables the representation of the temperature or liquid (depending on whether the grid represents a liquid or fire simulation).
As fire (natural color) – When enabled, the natural color of a hot black body is used for coloring the temperature. Otherwise the color ramp is used.
Smoke – Enables the representation of the smoke.
RGB – Enables the representation of the RGB channel or Wavelet channel, depending on which one is being used.
Fuel – Enables the representation of the fuel.
Velocity – Enables the representation of the velocity.