Created attachment 100762 [details]
slg4 log with CEDAR

What command are you running this with?  Is it just running bin/slg4 as built
from the luxrays source?

I believe that I have built the luxrays repository with changeset 2099 (a.k.a.
7459cd8a9583 as quoted as a changeset hash in your backtrace), but every time
that I attempt to run bin/slg4, I get OpenCL errors due to missing image format
support in clover.  

Log from bin/slg4 attached.

I believe that the line causing the error *might* be in
src/luxrays/accelerators/qbvhaccel.cpp:411

cl::Image2D *qbvhBuff = new cl::Image2D(oclContext,
            CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR,
            cl::ImageFormat(CL_RGBA, CL_UNSIGNED_INT32),
            nodeWidth, nodeHeight, 0, inodes);