Features

General

• Developed by veteran with 18 years of GameMaker experience
• Written in pure GML and GLSL ES for maximum portability
• Wrapped in easy to use object-oriented interface
• Every struct, function, macro and variable is documented
• Split into modules so you can pick which parts you need in your project

Asset pipeline

• Custom binary file formats designed for fast loading in GameMaker
• BBMOD CLI - a command line tool for converting models and their animations to BBMOD format
• Experimental conversion of materials to BBMOD format with BBMOD CLI
• Experimental conversion of models from Y-up space to Z-up space with BBMOD CLI
• Utilizes Assimp to support vide variety of file formats, including FBX, OBJ, glTF and COLLADA (see full list here)
• Optional dynamic library (DLL and dylib) for importing third-party model formats from in-game
• OBJ model importer written in GML(includes basic material support)
• BBMOD GUI - a windowed application for easier content creation (for Patrons only)

Animations

• Vertex skinning
• Node-based animations
• Fast precomputed animations (GPU-ready data)
• Animation events triggered at specific frames
• Animation transitions
• Transform bones with code
• Bone attachments

PBR materials

• Support for both metallic-roughness and specular color-smoothness workflows
• Tangent-space normal maps
• Baked ambient occlusion
• Emissive textures (RGBM encoded)
• Cheap subsurface scattering
• Support for different shaders per render pass
• GGX specular reflection model

Lights and shadows

• Ambient light (split into lower and upper hemisphere)
• Dynamic point, spot and directional lights
• Dynamic soft shadows for point, spot and directional lights (single cascade)
• Image-based lighting with HDR support (RGBM encoded)
• Reflection probes (pre-baked or captured in-game)
• Support for HDR baked lightmaps (RGBM encoded)

Deferred renderer

• Support for unlimited number of shadow-casting lights
• Requires multiple render targets and 16-bit floating point surfaces!

Forward renderer

• Limited to 1 directional light and up to 8 punctual lights
• Only a single light can cast shadows
• Supported on all platforms!

Fog

• Configurable color, start, end and maximum intensity

Cameras

• First and third person
• Perspective and orthographic
• Built-in mouselook - includes support for browsers through Pointer Lock API (HTML5 platform)
• Camera exposure and HDR rendering
• Convert 3D coordinates to screen coordinates
• Convert screen coordinates to a 3D vector in world-space

Post-processing

• High quality screen-space ambient occlusion (SSAO)
• Kawase blur
• Directional blur
• Radial blur
• Depth of field with configurable bokeh shape
• Chromatic aberration
• Exposure
• Gamma correction
• Reinhard tonemapping
• Color grading LUT
• Luma sharpen
• Film grain
• Barell and pincushion lens distortion
• Screen distortion via normal map
• Sun shafts
• Light bloom
• Lens flares
• Lens dirt
• Monochrome
• Vignette
• Fast approximate anti-aliasing (FXAA)

Render queues

• Enqueue commands and execute later
• Render queues sorted by priority (e.g. draw transparent models last)
• Filter mesh draw calls by instance ID

Batching

• Batch multiple models into a single vertex buffer to minimize draw calls
• Each model in a batch can have its own position, uniform scale, color and ID

Particles

• Optimized CPU particle system
• Module based - define particle behavior by composing configurable modules
• Gravity, attractors, repellers and collisions
• Soft particles - particles smoothly disappear when intersecting with other geometry
• Shadow casting and receiving
• Depth sorting

Terrain

• Heightmap based terrain
• Split into chunks to support large scale terrains
• Support for up to 5 material layers, controlled with a splat map
• Color map (multiplies diffuse/albedo texture)
• Precomputed tangent and bitangent vectors for full normal mapping support
• Retrieve terrain height, normal and layer index at a specific position

Level editing

• Mouse picking of instances
• Highlight of selected instances
• Gizmos for moving, rotating and scaling of selected instances
• Global and local space editing
• Save & load system for instances - de/serialize instances from/to buffers

Misc

• Vectors (2D, 3D, 4D), matrices, quaternions and dual quaternions
• Plane, Sphere, AABB and frustum intersection tests and raycasting
• Compatibility layer for ColMesh - a popular library for 3D collisions
• Check for multiple render targets (MRT) support
• Check for vertex texture fetching (VTF) support
• Support for VTF on Windows through DLL (OpenGL platforms supported natively)
• Utility functions for strings, arrays, buffers, sprites, async loading and more...
• State machines