OK, The intensity is resolved in each project. beefore with 1 o 2 values, the matrix was shining ok, now the range is more extense and it needs higher values. Solved but...
The color is not possible to change as in T1452 for instance.
The intensity was wrong, you can test it using the example: examples/Outputs/Leds/max72xx_matrix/MD_MAX72xx_Intensity This change the intensity from minimum to maximum. Before the led intensity barely changed, now if goes from very dark to maximum.