The Indigo layer of a Prismatic Wall states :

While this layer is in place, spells can't be cast through the wall

By comparison, a Globe of Invulnerability states :

Any spell of 5th level or lower cast from outside the barrier can't affect creatures or objects within it, even if the spell is cast using a higher level spell slot. Such a spell can target creatures and objects within the barrier, but the spell has no effect on them. Similarly, the area within the barrier is excluded from the areas affected by such spells.

It is quite clear that, say, a Fireball cast outside of a Globe of Invulnerability can’t extend inside it... But Prismatic Wall seems to lack this clause. So, would a Fireball, or other area of effect spell, cast on a point on one side of a Prismatic Wall extend through the other side of said wall  ?

The Indigo layer of a Prismatic Wall states:

While this layer is in place, spells can't be cast through the wall

By comparison, a Globe of Invulnerability states:

Any spell of 5th level or lower cast from outside the barrier can't affect creatures or objects within it, even if the spell is cast using a higher level spell slot. Such a spell can target creatures and objects within the barrier, but the spell has no effect on them. Similarly, the area within the barrier is excluded from the areas affected by such spells.

It is quite clear that, say, a Fireball cast outside of a Globe of Invulnerability can’t extend inside it... But Prismatic Wall seems to lack this clause. So, would a Fireball, or other area of effect spell, cast on a point on one side of a Prismatic Wall extend through the other side of said wall?

The Indigo layer of a Prismatic Wall states :

While this layer is in place, spells can't be cast through the wall

By comparison, a Globe of Invulnerability states :

Any spell of 5th level or lower cast from outside the barrier can't affect creatures or objects within it, even if the spell is cast using a higher level spell slot. Such a spell can target creatures and objects within the barrier, but the spell has no effect on them. Similarly, the area within the barrier is excluded from the areas affected by such spells.

It is quite clear that, say, a Fireball casted outside of a Globe of Invulnerability can’t extend inside it... But Prismatic Wall seems to lack this clause. So, would a Fireball, or other area of effect spell, casted on a point on one side of a Prismatic Wall extend through the other side of said wall ?

The Indigo layer of a Prismatic Wall states :

While this layer is in place, spells can't be cast through the wall

By comparison, a Globe of Invulnerability states :

Any spell of 5th level or lower cast from outside the barrier can't affect creatures or objects within it, even if the spell is cast using a higher level spell slot. Such a spell can target creatures and objects within the barrier, but the spell has no effect on them. Similarly, the area within the barrier is excluded from the areas affected by such spells.

It is quite clear that, say, a Fireball cast outside of a Globe of Invulnerability can’t extend inside it... But Prismatic Wall seems to lack this clause. So, would a Fireball, or other area of effect spell, cast on a point on one side of a Prismatic Wall extend through the other side of said wall ?