Use a physically based material to create realistic looking objects in Spark AR Studio. The different properties in this material allow you to add surface roughness, metallic effects, and lighting that mimics real world light.
Physically-based materials work best on modern devices. Spark AR Studio won't show physically-based materials in effects on older devices.
For a complete physically-based material, you'll need:
To create a physically-based material:
When you've created a physically-based material you'll be able to edit these properties in the Inspector:
Albedo is the base color and texture of the material. You'll see 2 options here:
Below, we've added an Albedo texture:
Surface Parameters and ORM texture
This is where you'll apply an ORM texture, using the dropdown next to ORM Texture. You can then adjust the sliders, to control:
Spark AR Studio packs ORM values into the RGB channels in that order.
Here, we've added an ORM texture to a physically-based material:
This is where you'll add a normal map. The normal map lets you create the appearance of bumps, grooves and rivets without adding extra geometry to your object. Representing these details as a texture instead of geometry will increase the performance of your effect.
Check the box next to Normal, then apply your normal map next to Texture.
Check this box to allow your material to illuminate from itself. Light emitted will only affect your material, not other materials in your scene - like a standard light source would.
You can also use the Color option to:
The emission texture and color will modulate.
Apply either a preset environment texture, or import your own.
Environment textures use images to provide lighting that mimics lighting in a real-life setting. For example the lighting in an office or outside on the beach.
Below, we've added an environment light, ORM texture and normal map:
Scale the textures you've applied to your material.
Shift the origin of your textures.
Sets the blend mode of the material:
Back - Discard pieces of the mesh that are facing away from the viewer. Most effects use this mode to improve performance.
Front - Discard pieces of the mesh that are facing the viewer.
Adjust the slider to set transparency.
Use the slider to make semi transparent areas, below a certain threshold, transparent.
Check this box to render both sides of the mesh.
Advanced Render Options
Use the Write to Depth Buffer and Use Depth Test checkboxes to control certain order parameters for the object the material is applied to.
Both boxes checked
Enable read and write depth buffer. This means that closer objects will obscure far objects.
Write to Depth Buffer box checked
Disable read depth and enable write depth. These objects will always draw over any other object. They will obscure father objects that are drawn after unless these objects have either the Write to Depth Buffer or both boxes checked.
Use Depth Test checked
Enable read depth and disable write depth. These objects will be obscured by nearer objects that have already been drawn that have either the Write to Depth Buffer or both boxes checked.
These objects can be obscured by any objects drawn afterwards, whether they’re nearer or further away.
Uncheck both boxes
Disable read and write depth. These draw on top of any objects of any type already drawn, and in turn will be overdrawn by any later rendered objects, regardless of whether they are nearer or further away.
Choose the output color encoding of the material.
sRGB will apply the expected gamma correction after shading. Linear will not apply any conversion after shading computation.