150x150 B9Creator depth from Grayscale - 101 shades and 150x150 pixels

WARNING: for the moment, only use "flat" surface
(...because the curved surfaces are causing "out of memory" in the servers. I have got a possible solution in mind and will update this app in the next days.)
This app is specifically designed to be quite intuitive for B9Creator users.
Feel free to message me with ideas for improvement.
Upload an image to convert it to a gray scale depth map.
Transparency, in PNG, works.
Images are stretched to fit a 150 x 150 pixels envelope.
Colors are converted to gray scale.