How do you preserve sculpt layer information when exporting from Mudbox to Unreal Engine?

1 Export as PSD

The first step is to export your sculpt layers as PSD files from Mudbox. This will save each layer as a separate image file that contains the height information of your sculpt. To do this, select your model in Mudbox and go to File > Export Selection. Choose PSD as the file format and make sure you check the option to export sculpt layers. You can also choose the resolution and quality of your images. Mudbox will create a folder with the same name as your model and save all your PSD files there.

2 Import as textures

The next step is to import your PSD files as textures in Unreal Engine. To do this, open Unreal Engine and create a new project. Then, go to File > Import into Level and browse to the folder where you saved your PSD files. Select all the files and click Open. Unreal Engine will import them as texture assets and place them in the Content Browser. You can rename them if you want, but make sure you keep the same order as in Mudbox.

3 Create a material

The final step is to create a material that uses your textures to recreate your sculpt layers in Unreal Engine. To do this, right-click on an empty space in the Content Browser and choose Create Material. Name your material and double-click on it to open the Material Editor. In the Material Editor, drag and drop your textures from the Content Browser to the graph. Then, connect each texture to a separate Multiply node and add the outputs of the Multiply nodes together using an Add node. Finally, connect the output of the Add node to the World Displacement input of the Material node. This will apply your textures as displacement maps to your material, which will mimic the effect of your sculpt layers.

You can now apply your material to any mesh in Unreal Engine and see your sculpt layers in action. You can also adjust the intensity of each layer by changing the values of the Multiply nodes. This way, you can preserve your sculpt layer information when exporting from Mudbox to Unreal Engine and have more control over your final result.