Physically based rendering and GBuffer

[Goshido]

It's needed to implement Physically based rendering (PBR) for example Cook-Torrance lighting model. Implementation must use GBuffer approach to test real impact which is caused by deferred shading technique on tiled rendering GPU.

[Goshido]

Scene converter has been implemented.

Prototype preview video.

As you can see there are a lot work to do. For example:

• union object export support
• form object export support
• CSG geometry export support
• painting material mask support

[Goshido]

Material mask support. Video link is here.

[Goshido]

It was discovered strange behavior with uniform buffer memory layout. The issue was created on the ARM support page. Direct link is here.

[Goshido]

The official response has been received from ARM support. The issue described above is a driver bug which is fixed in latest driver revisions. So it was decided to implement workaround.

For more information please refer to link.

[Goshido]

Awesome results after changing all textures to the ASTC format inside KTXv1 media container:

[Goshido]

Proprietary .mesh2 format has been supported. The main advantages:

• index buffer
• bounds information

[Goshido]

Frustum test has been integrated.

[Goshido]

Features:

• multiview
• input attachments
• subpasses
• point light with dynamic shadows
• PBR lighting
• Cook-Torrance primary point light

Video demo is here.

The performance is quite promising. Redmi Note 8 Pro produces 65 FPS in average.

[Goshido]

The original goals have been achieved. The task is too abstract now so it will be closed.