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The drawable count in Vizible is related to the number of objects and materials in 3ds Max. An object here refers to one or more geometry objects that have been attached. One object with one material is one drawable, one object with two materials is two drawables, etc. Vizible culls the scene based on drawables so a high number (e.g. more than 2000) may contribute to high cull times and thus frame rate drops. In most cases, an optimized scene will have a drawable count in the low hundreds.
The drawable count in Vizible is related to the number of objects and materials in 3ds Max. An object here refers to one or more geometry objects that have been attached. One object with one material is one drawable, one object with two materials is two drawables, etc. Vizible culls the scene based on drawables so a high number (e.g. more than 2000) may contribute to high cull times and thus frame rate drops. In most cases, an optimized scene will have a drawable count in the low hundreds.
In order to reduce the number of drawables, attach objects that share the same material using the "Attach" operation within the "Editable Mesh" or "Editable Poly" modifier. For example, if two chairs with the same material are attached to become one object, the result will be one drawable. If two chairs with different materials are attached, the result will be one object, but two drawables. So nothing is gained in terms of drawable reduction. Attaching only a few objects together can be done quite easily using the manual method described above. To save time with this operation when many objects are involved, use this QuickAttach script.
In order to reduce the number of drawables, attach objects that share the same material using the "Attach" operation within the "Editable Mesh" or "Editable Poly" modifier. For example, if two chairs with the same material are attached to become one object, the result will be one drawable. If two chairs with different materials are attached, the result will be one object, but two drawables. So nothing is gained in terms of drawable reduction. Attaching only a few objects together can be done quite easily using the manual method described above. To save time with this operation when many objects are involved, use this QuickAttach script.
Once objects are attached in Max, transformations can only be applied to the combined object in Vizible. Continuing with the example above, once the two chairs are merged, they can no longer be moved individually.
Once objects are attached in Max, transformations can only be applied to the combined object in Vizible. Continuing with the example above, once the two chairs are merged, they can no longer be moved individually.
The following are some notes and suggestions related to drawable reduction:
The following are some notes and suggestions related to drawable reduction:
- Grouping: Grouping objects in Max will not reduce the drawable count. Make sure objects are attached and not grouped.
- Polygon Reduction: Before attaching objects to reduce drawables, make sure polygon reduction is complete.
- Light Baking: Consider how objects will affect light maps. For example, if all objects are attached as one and the scene is baked for lighting, one large light map will be created. This may cause crashes during the baking process due to insufficient RAM.
- Attaching objects with overlapping materials: Max is buggy, so sometimes if you have object 1 with material AB and object 2 with materials CB you'll end up with ABCB instead of ABC. To avoid this issue, first split object 1 into 1A and 1B and object 2 into 2C and 2B. Then when merging, you'll end up with materials ABC on one object
The following image shows three tables in Max. Each table is comprised of a table top and stand(s). Two materials are used, one for the tops and one for the stands
The following image shows three tables in Max. Each table is comprised of a table top and stand(s). Two materials are used, one for the tops and one for the stands
The following are a few different merge options and the resulting drawable counts in Vizible:
The following are a few different merge options and the resulting drawable counts in Vizible:
1. Table tops and stands are exported as separate objects. Seven objects, each with a single material, equals seven drawables.
1. Table tops and stands are exported as separate objects. Seven objects, each with a single material, equals seven drawables.
2. Each table is exported as a single object (top plus stand). Three objects, two materials per object, equals six drawables.
2. Each table is exported as a single object (top plus stand). Three objects, two materials per object, equals six drawables.
3. All tops and stands are attached together as a single object. One object with two materials equals two drawables.
3. All tops and stands are attached together as a single object. One object with two materials equals two drawables.
Option 3 is the best choice for drawable reduction and thus performance. However, if there is a need to move each table individually in Vizible, option 2 should be used.
Option 3 is the best choice for drawable reduction and thus performance. However, if there is a need to move each table individually in Vizible, option 2 should be used.
The following images show how to merge multiple objects into a single object. First, a single part (here a table top) is selected and the "Attach" button is pressed
The following images show how to merge multiple objects into a single object. First, a single part (here a table top) is selected and the "Attach" button is pressed
Next, select all the remaining objects to attach and then release the "Attach" button.
Next, select all the remaining objects to attach and then release the "Attach" button.
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