Unity Lighting, Texture, Glass, Reflection Probe


In Unity
Add some primitives

Add GameObject->3D Object->Cube etc.

Add some materials
Select Assets->Create->Material.
Double click the material in Assets below.
Drag and drop a material onto a primitive

Albedo Color Maps
Make some 256x256 pixel tiff files in Photoshop and save the files into your Assets folder.
Select Material you would like to map.
Drag the map from Assets onto the Albedo square in the Inspector.

Take the blur out of all imported maps.
Select the map in Assets  (This will work with multiple selections)
Select Filter Mode Point (No Filter)

Hit Apply

Transparency Maps
In Unity
Select a Material you would like to map in Assets.

Drag the transparency map from Assets onto the Albedo square in the Inspector.

Change Surface Type to Transparent
     (Transparent does not cast shadows, non URP renderers used cut-out which did cast shadows with transparency maps.)
Change Tiling to a higher number for repeated texture.
Notice your object is single sided, you will need to model the inside and outside in Maya.
Edit->Mesh Extrude in Maya is great for this.

TIF Transparency Maps

In Photoshop
Make a 32x32 pixel dot map with an Alpha channel in Photoshop.

Use the Elliptical Marquee tool to select a circle     PS_elliptical_marquee
Use Select->Save Selection...  The defaults are good
Select the Window->Channels window
          Select the Alpha1 channel
          Paint the transparent sections black, opaque white, and translucent gray.

Save the file into your Unity Assets
folder as a tiff.

PNG or TIFF Transparency Maps
In Photoshop
transparency maps will have transparency in the Layer, with no Background layer.

How to create a Normal Map (bump)
In Photoshop
Open an image file.
Select Filter->3D->Generate Normal Map...
Save the file as a new name into your Unity Assets folder.

In Unity
Select Material you would like to map in Assets.

Drag your normal map from you Assets onto the Normal Map in the Inspector
Click the Fix Now button
Adjust the bumpiness of the map to the right.

AutoDesk Interactive Material
Select Assets->Create->Material.
In the Inspector, Change the Shader to:
Universal Render Pipeline>AutoDesk Interactive>AutoDesk Interactive Transparent

This shader includes options for Metalness and Roughness.

All values seem to be controlled with maps.

Select UseColorMap
Drag and drop a ColorMap with an alpha channel or layer to BaseColor
Select UseOpacityMap

Change UVScale for texture repeats.

This Material works well with Substance Painter.

Import a new Skybox
Choose the
Asset Store tab next to the Scene window  (or Window Asset Store)
     Type skybox in the search bar, Select Free Assets
Download and Import

Put the main view window back to Scene

Choose Window->Rendering->Lighting Settings
Click the unity_dot to change the Skybox Material to the skybox you imported.
     You can also make your own.

Glass and Reflection

Select Assets->Create->Material
Double click the material in Assets below.

Change Shader to Autodesk Interactive  in the Inspector
Change Rendering Mode to Transparent

Change the Albedo color to Value 7 and Alpha to 15  transparent

Increase Metalic   (reflectivity)
Increase Roughness
  (shiny dull)

Drag a normal map from your
Assets onto the Normal Map in the Inspector
Click the Fix Now button
Adjust the bumpiness of the map to the right, keep low

Drag and drop the material onto the model.


Reflection Probe for shiny glass and chrome
(The class template already has a reflection probe.)

Select GameObject->Light->Reflection Probe
Change the Position to 0,0,0 in the Inspector
Make sure your objects are within the cube area. Use this editor to adjust. unity_reflection_probe

Change the Type
to Realtime     (default Baked)
Change the
Clear Flags and Background color to match your camera

Increase Smoothness or Metalic
on Materials to change the reflectivity

Fix Shadows and Lighting
These settings can effect performance.

Edit->Project Settings...
          Locate Render Pipeline Asset URP-HighFidelity (Universal Render Pipeline Asset) (This is the default for URP)
               Right click on URP-HighFidelity (Universal Render Pipeline Asset)
                    Select Properties...

                         Decrease Max D
to 30
   (default 150)  This what causes low resolution shadows!

Select your Directional Light

     Turn on Shadows
     Turn down
Strength to lighten the shadow color, try .5    (default 1)

     Change Render Mode to Important  Do this to main lights, if you have a scene with many lights you will need this. (default auto)


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