Mask='cross' : how to reduce the width of the mask?


I am using ElementArrayStim with elementMask=‘cross’ to obtain a grid of crosses. I would need the crosses to look thinner (e.g. to have a smaller width). Is there a way to do that? E.g. what arguments should I pass in maskParams ? I really cannot figure it out.

Note: this problem is equivalent as having a single grating with mask=‘cross’ and tex=None. I want to reduce the width of the mask!

Thank you so much for your help!