R3D Roadmap

v0.4

[ ] Better SSAO Support Refactor R3D_End so that in forced forward mode, SSAO can also be applied to opaque objects stored in the forward draw calls array.
[ ] Add Skybox Intensity Factor Introduce a control factor for the skybox intensity. This factor should be applied both when rendering the skybox and when computing IBL for objects.
[ ] Add Texture Coordinate Scale & Offset in R3D_Material Add texture coordinate scale and offset parameters to R3D_Material (currently only available for R3D_Sprite). This may also require reworking how sprite animations are handled.
[ ] Add 3D Model Animation Support for Instanced Rendering Add support for animated 3D models in instanced rendering. Initially, all instances will share the same animation frame.
[ ] Add ‘Light Affect’ Factor for Ambient Occlusion Currently, occlusion (from ORM or SSAO) only affects ambient light (simulated or IBL). Add a factor to control how much direct lighting is influenced too. While this is less physically accurate, it allows better artistic control. Note: Consider splitting this into two separate factors: one per material and another for SSAO globally.

[ ] Create Shader Include System Implement an internal shader include system to reduce code duplication in built-in shaders. This could be integrated during the compilation phase, either in glsl_minifier or a dedicated pre-processing script.
[ ] Add Support for Custom Screen-Space Shaders (Post-Processing) Allow custom shaders to be used in screen-space for post-processing effects.
[ ] Add Support for Custom Material Shaders Allow custom shaders per material. This will likely require a different approach for deferred vs. forward rendering. Deferred mode will probably offer fewer possibilities than forward mode for custom material shaders.

[ ] Improve Shadow Map Management Instead of using one shadow map per light, implement an internal batching system with a 2D texture array and Sample2DArray in shaders. Note: This would remove per-light independent shadow map resolutions.
[ ] Implement Cascaded Shadow Maps (CSM) Add CSM support for directional lights.
[ ] Implement Screen Space Reflections (SSR) Add SSR support with an example.

Note: v0.6 features are still incomplete.

After implementing Sampler2DArray for shadow maps, explore using UBOs for lights. Evaluate whether this is more efficient than the current approach.
Provide an easy way to configure the number of lights in forward shaders (preferably runtime-configurable).
Implement a system to save loaded skyboxes together with their generated irradiance and prefiltered textures for later reloading.
Improve support for shadow/transparency interaction (e.g., colored shadows).