<scene version="2.2.1"> <shape type="sphere"> <float name="radius" value="0.9" /> <transform name="to_world"> <translate x="1" y="1"/> </transform> <emitter type="area"> <rgb name="radiance" value="100,0,0"/> </emitter> </shape> <shape type="sphere"> <float name="radius" value="0.9" /> <transform name="to_world"> <translate x="1" y="-1"/> </transform> <emitter type="area"> <rgb name="radiance" value="0,100,0"/> </emitter> </shape> <shape type="sphere"> <float name="radius" value="0.9" /> <transform name="to_world"> <translate x="-1" y="1"/> </transform> <emitter type="area"> <rgb name="radiance" value="0,0,100"/> </emitter> </shape> <shape type="sphere"> <float name="radius" value="0.9" /> <transform name="to_world"> <translate x="-1" y="-1"/> </transform> </shape> <integrator type="direct"> <integer name="shading_samples" value="8"/> </integrator> <sensor type="perspective"> <transform name="to_world"> <translate z="-10" /> </transform> <float name="fov" value="45"/> <sampler type="independent"> <integer name="sample_count" value="128"/> </sampler> <film type="hdrfilm"> <string name="pixel_format" value="rgba"/> <integer name="width" value="512"/> <integer name="height" value="512"/> </film> </sensor> </scene>