Build error when attempting to merge tile meshes

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Merged meshes must not exceed the maximum number of vertices per mesh. The chunk size or combine method should be configured in a way that is appropriate for your requirements.

Symptoms

The following error message is logged to the console window when attempting to build one or more tile systems:

count <= std::numeric_limits<UInt16>::max();

Causes

This error occurs when the number of vertices in the combined mesh exceeds the maximum number of vertices permitted in a mesh (64K).

Resolve

Reduce the size of the combined meshes.

Deselect Combine into submeshes:

When using multiple materials you can sometimes get a little extra mileage before encountering the 64k vertex limit by combining tiles into a separate mesh for each material. Though if you continue to encounter the 64k vertex limit you will need to reduce the size of your chunks.

Reduce chunk size:

The following advise is based upon the selected Combine Method.

By Chunk : Specify a smaller chunk size using the "Custom Chunk in Tiles" combine method instead.

By Tile System : Consider using one of the other combine methods instead.

Custom Chunk In Tiles : Specify smaller chunk size.

You may want to consider the following if the above advice does not help you to resolve your problem:

• Avoid selecting "Static" property for some brushes so that not all tiles are combined.

• Utilize the static batching feature of Unity Pro instead.

• Reduce the number of vertices in your tile meshes.

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