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The Compression tab of Blaze 3D Studio allows the user to adjust the compression settings used to produce the 3D project file. These controls allow you to find a suitable balance between the file size and display quality of the presentation, enabling a high quality 3D model with a small file size.
Using the Compression Settings in Blaze 3D StudioThe Compression settings allows the user to adjust various settings that will affect the published files. These include control over precision for the geometry and resolution and compression quality for textures. This is useful for achieving a desired filesize, for deployment. The effect of these settings may be previewed in the 3D view by clicking the "Compressed" button.
The Compression settings are grouped into four sections described below and shown in Figure 1.
This section defines the level of display and control provided in the below 2 sections. Basic provides concise higher level controls whereas Advanced displays all the available controls.
Geometry
- Initial Camera – Defines whether the initially positioned render window camera is the current preview camera or the camera defined in the H3A file (produced in the 3D Modelling Package software such as Max/Maya).
- Precision (bits) – The number of bits used to define the geometric co-ordinates.
- Scene Scale – A scaling parameter applied to the 3d model, allows relative sizing of one 3d model against another.
- Include Animations – A Boolean value which determines whether the defined animation are included in the published output.
Preview Display
This section provides two buttons, Original and Compressed, which allow you to toggle between previewing the 3D model in the display pane to the right using either original textures or their compressed equivalents (which will be used in the final published model). Once compressed a display appears to the right of the Compressed button providing an approximate value for the predicted file size of the complete 3D model based on purely the texture colour maps used (typically the largest element in a 3D model).  Figure 1: Screenshot showing the Compression Settings in Blaze 3D Studio
Optimising the Compression of your 3DWhen selecting compression options, you should be aware that small adjustments on some sliders have a large effect. This is particularly true for the main slider, texture resizing. You can allow Blaze 3D Studio to calculate the resolution needed by clicking on the button, but for fine tuning it is best to select the manual scale option.This is simply a scale that is applied to your current textures and will resize them depending on that setting. Obviously, the higher this slider is set, the larger the file size.
There are three compression methods available, Blaze, Blaze V2 and JPEG. You will find that each has it’s advantages and you will have to experiment somewhat to decide which is most effective for your application.
In general, it is not advisable to go higher than 95 on the compression sliders as beyond this the file size increases vastly.
You have to find a balance between the texture scale and the compression settings to obtain the file size you require at the visual quality you want.
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