I found this bug:
When the texture on the morph is set to a texture with depth other 
than 32 bits I get a primitive fail error on my mac.( The Squeak3D
plugin is the old one from 2.7 or older( is there a newer for the mac ?))
When I run without the Squeak3D plugin I can set textures to any depth, but
is is oh-so-sloooooow.
A workaround that covert the texture to depth 32 is included in this mail:-)

Karl
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'From Squeak2.9alpha of 26 June 2000 [latest update: #2447] on 16 July 2000 at 2:06:26 pm'!

!B3DMorph methodsFor: 'menu' stamp: 'kfr 7/16/2000 14:03'!
setTexture
	| tex |
	tex _ ((B3DTexture fromDisplay:(Rectangle originFromUser: 128 at 128)) asFormOfDepth:32) asTexture.
	tex wrap: true.
	tex interpolate: false.
	tex envMode: 0.
	texture _ tex.
	self changed! !