Elementarraystim - applying a texture/mask to the field rather than the elements?

Coding
4

Yes, fair point about being constant within an element. The below is somewhat inelegant but would seem to work more completely:

import numpy as np

import psychopy.visual
import psychopy.event

import pyglet.gl

bg_col = -1.0

win = psychopy.visual.Window(
    size=[400, 400],
    units="pix",
    color=[bg_col] * 3,
    fullscr=False
)

n_dots = 500

dots = psychopy.visual.ElementArrayStim(
    win=win,
    nElements=n_dots,
    xys=np.random.uniform(-120, 120, (n_dots, 2)),
    units="pix",
    sizes=5.0,
    elementTex=None,
    elementMask="circle"
)

mask_tex = psychopy.visual.GratingStim(
    win=win,
    tex=np.ones([256, 256]) * bg_col,
    mask="gauss",
    units="pix",
    size=[256, 256]
)

dots.draw()

pyglet.gl.glBlendFunc(
    pyglet.gl.GL_ONE_MINUS_SRC_ALPHA,
    pyglet.gl.GL_SRC_ALPHA
)

mask_tex.draw()

pyglet.gl.glBlendFunc(
    pyglet.gl.GL_SRC_ALPHA,
    pyglet.gl.GL_ONE_MINUS_SRC_ALPHA
)

win.flip()

psychopy.event.waitKeys()

win.close()