In Spark AR Studio, you can use environment textures to mimic the light in a specific real world environment. This is also known as using image-based lighting.
You'll combine environment textures with the physically-based material in Spark AR Studio.
You can either add environment textures to individual materials or to the whole scene.
Environment textures are made from images that capture a scene - like an office or the beach on a sunny day - from all directions. For example, using the Office environment texture included in Spark AR Studio would provide an object with similar lighting to an office.
Below, we've added an environment texture to the material applied to the object on the right:
There are several environment textures built into Spark AR Studio, and you can also add your own. Environment textures should be HDR images, and we recommend maximum 4K images.
First add an environment texture to your project:
If there's an environment light in the scene, you can still apply environment textures to single materials. Environment textures applied to individual objects will override the environment light.
Adding an environment light will apply environment textures to all objects in your scene that have a physically-based material.
There's a huge range of environment textures to choose from on HDRI Haven and on other similar websites.
The texture will be listed in the Assets panel. The image in the Assets panel won't look exactly like the texture you imported, because the texture undergoes some processing before it can be used as an environment texture in Spark AR Studio.
There can only be 1 environment light in a scene.
Environment textures can increase the size of your effect, which can impact performance.
Before you export your effect, make sure any unused environment textures have been removed from the Assets panel. Otherwise, they'll still be included in the overall size of your effect.