Acceleration structure geometry (used by [RenderingDevice]). [RDAccelerationStructureGeometry] describes a set of triangles used as raytracing geometry in the [method RenderingDevice.blas_create] method. The geometry is always in triangle list form, either indexed or non-indexed. Triangle strips are not supported. Flags for the geometry. Buffer containing vertex indices. If [code]null[/code], triangles are non-indexed. Number of indices used by this geometry in [member index_buffer]. Byte offset of the first index in [member index_buffer]. Buffer containing vertices. Number of vertices used by this geometry in [member vertex_buffer]. Format of the vertices in [member vertex_buffer]. Byte offset of the first vertex in [member vertex_buffer]. Number of bytes between each vertex in [member vertex_buffer].