The phrase "in material forms" is correct and usable in written English.
You can use it to refer to physical things, rather than abstract ideas. For example, "We found evidence of supernatural activity in material forms like strange odors and unusual noises."
Wherever he casts his eye, what he sees, in material form, are the lineaments of gratified desire.
Her next foray involved sound, which she represented in material form: as prints, photographs, and small sculptures on pedestals.
Among the most striking quilts are those made by Loretta Pettway, which are neighborhoods of emotion rendered in material form.
Solaris seems to be a sort of sentient being, able to toy with its human visitors by identifying their deepest traumas and casting them in material form.
Gordon does her Good Friday work, moving from relating to her mother in material form — a form that ultimately repulsed Gordon — to a new noncorporeal relationship where all phases of her mother's life can be seen at once.
Presenting more than a dozen major sculptural works and videos from the past decade, the shows display a remarkable talent for visual metaphor and for embodying symbols in material form.
Another Blue Note pianist offered a mystical revelation: Lion regarded Thelonious Monk as "the holy grail of jazz", and said he was proud to be "the first to put his radical and unorthodox ideas on wax", which makes it sound as if recording was a way of trapping spirit in material form.
Processes happen in time; but they take place (in material form) in space.
Things exist in space; but they persist in material form through time; they are relatively stable.
In this way the article also considers how cultural value is articulated through changing concepts of time and temporality embodied in material form.
Hegel's idea was that the fine arts were those that realized the spirit of the people by bringing truth or the "idea" to light in material form (for more on Hegel's aesthetics see Houlgate 2014).
