I want to set the Grating color individually

Coding
1

I am trying to do research on color motion.
I would like to create an R-G grating and obtain motion aftereffects. However, the current psychopy specification allows only one color to be specified, but the second color is automatically set to the opposite color.

I would like to define a second color for grating like psychotoolbox.

In addition, I would like to have the motion by phase shift.

I do not have an idea to solve this problem with my technology😂.
Thank you in advance for your help.

2

Try messing around with the ‘contrast’ argument when creating your GratingStim. It just functions as a modifier on the foreColor argument, so you can’t name your contrast color directly, but with a little fine-tuning you should be able to get most color options out of it.

3

Hi there,

You can also use an image as the texture for your grating stimulus.

For the motion you can set the phase to be t*3 for example, depending on the speed you want. t is a clock that exists in PsychoPy that is the time since the routine started in seconds.

There’s information on this and more here.