cl_khr_3d_image_writes emulation

My GTX 560 doesn’t support “cl_khr_3d_image_writes” extension (WinXP, drivers 285.58).
I’d like to try “3D ink droplet” simulation on 512^3 grid in WebCL see
Can I find an accurate example of read/write to 2D atlas for ~512^3 texture with periodic (and/or mirrored) boundary?


Due to L1, L2 caches I can use buffers to store 3d data and I need not 3d texture at all.