Context

This engine is intended to be used as a drop-in replacement to Three.js’s WebGLRenderer.

Problem

It tends not to work as a drop-in replacement out-of-the-box, because the renderer crashes when:

• Meshes contain a THREE.Geometry instead of a THREE.BufferGeometry.
• It uses materials for which the texture images are not loaded yet.

This might cause people who try to repl

Description

Right now the MDI ranges are not compacted (having the drawcalls with 0 instances removed).

But the DrawIndirectAllocator and all the resources in on the C++ side are already setup for this

Solution proposal

An additional Dispatch (direct, cause you can have a list of MDIs up front) over the drawcalls that prefix sums their boolean instanceCount!=0u flag

Then another