This video shows how to use height and roughness maps. You will learn how to use an image and map a height map and roughness map in Affinity Photo. The final composite and render was done in Blender.
Height Map
I will be using a tileable texture I made in a previous tutorial
I duplicate the image and rename the layer to “height”
I open the Adjustment panel (under the Window menu) and choose HSL Default
I lower the saturation to -100-percent and the luminosity to around 70-percent
I export this image as a PNG – JPG will also work
Roughness Map
I duplicate the height map layer and rename it to roughness
I open the Levels Default and lower the Gamma since I want a lot of roughness
I export this image as a PNG – JPG will also work
Blender
In Blender, under the Shading Workspace, I import the Color map, Normal map (tutorial is in the description), and the new roughness map
For the height map, I subdivide the plane in edit mode
In object mode, I add a displace modifier and make a new texture
I open the texture panel and open the height map
Back on the displace modifier, I lower the strength