v0.70.0

0.70.0:

• shadowmap atlas, dynamic shadowmap resolution: high number of shadow casting lights are supported
• impostor rendering updates: optimizations, fixes
• environment probes: MSAA rendering option
• spot lights: added inner cone angle parameter
• GLTF importer supports punctual lights (KHR_lights_punctual extension)
• switched to physical light units for punctual lights (might break old lighting configurations)
• font renderer: HDR display output support
• graphics API: subresource data GPU upload/download improvements
• terrain generator: export heightmap image