Hmm... if you really want to change clothing, you'd need to succeed against Object Resistance, as the clothes are not part of your aura, no?

Some spells simply require a Success Test , with hits determining the level of success (as noted in the spells description).

Shapechange has LOS? *rummages through books* You're quite correct, sir, I missed that. I've not the slightest idea why, as that seems to be a no-brainer to change to touch as that saves on drain without actually making the spell less usefull generally, but you are fully correct.
That way the drain is correct, my apologies.

Highly processed and artifi cial items are more
diffi cult to aff ect than natural, organic objects. Spells cast
on non-living objects require a Success Test with a threshold
based on the type of object aff ected (see the Object Resistance
Table,).

Spells. Not opposed-test or resisted spells. Spells. Unless the description specifically states otherwise, all spells targeting non-living objects are subject to Object Resistance, even those that are not opposed.

A spell cast on a non-living, non-magic target is not resisted....

It makes sense to me that spells affecting non-living material are subject to object resistance. It's a passive threshold, not an opposed roll, hence not resisted.

Some spells simply require a Success Test, with hits determining
the level of success (as noted in the spell description).
Th e Magic + Spellcasting test must generate at least one net hit
to succeed and may need more if the eff ect has a threshold for
success. Th e spellcaster can always choose to use less than the
total number of hits rolled in a Spellcasting Test.

Spells cast on living or magic targets are oft en resisted,
and an Opposed Test is required. For area spells, the magician
rolls only once, and each target resists the spell separately. Th e
target resists physical spells with Body and mana spells with
Willpower. If the target is also protected by Counterspelling
(p. 175), she may add Counterspelling dice to this resistance

A spell cast on a non-living, non-magic target is not resisted,
as the object has no life force and thus no connection to
mana with which to oppose the casting of the spell (note that
only Physical spells will aff ect non-living objects; mana spells
have no eff ect). Highly processed and artifi cial items are more
diffi cult to aff ect than natural, organic objects. Spells cast
on non-living objects require a Success Test with a threshold
based on the type of object aff ected (see the Object Resistance
Table,). Note that
objects targeted by
Indirect Combat
spells do get to
resist the damage
as they would any
ranged attack, use
only their Armor
rating x 2 (or just
Armor against
spells with elemental
eff ects)
to resist the damage
caused (see
Barriers, p. 157).

Full quote of the section in question. Again, in the section for affecting non-living objects, spells are never resisted. Spells require a Success Test against a threshold equal to the Object Resistance, with the sole exclusion of Indirect spells.

Spells.

Not "Opposed Spells", not "Resisted Spells". The section in question makes no differential between that - any and all spells, specifically excluding Indirect spells, are subject to Object Resistance if they are cast on a non-living target. This includes Fashion, Fix, & Reinforce, among others.

Para 3: Objects lack the ability to resist spells in this manner and are granted a number of hits to resist such spells and require a threshold based on complexity to be affected by a spell. This is resolved as a Success Test against a Threshold of OR.

Paragraph 1: Some spells are success tests, others opposed.
Paragraph 2: Some spells affecting living targets are success tests, others opposed. Detail how opposed functions.
Paragraph 3: Objects cannot resist spells. Spells are handled as a success test with a threshold based on object complexity, with the singular exception of Indirect spells.

Paragraph 3 is complimentary to, but not a continuation of, Paragraph 2. Paragraph 2 details spells vs. living targets, Paragraph 3 details spells vs. non-living targets. It in no way suggests it only applies to opposed spells, & does suggest it applies to all spells in general.